Signals | Delphi

Name	Data Source	Description	Geographic Scope	Geographic Granularity, aka Geo-Level	Available Since	Available Until	Temporal Granularity	Reporting Cadence	Reporting Lag(nominal)	Revision Cadence	Demographic Scope	Pathogen / Syndrome	Severity Pyramid Rungs	Missingness	License / Data Use Restrictions
COVID-Related Doctor Visits	Change Healthcare	Estimated percentage of outpatient doctor visits primarily about COVID-related symptoms, based on Change Healthcare claims data that has been de-identified in accordance with HIPAA privacy regulations, smoothed in time using a Gaussian linear smoother	USA	county hhs (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-02-01	Ongoing	day	daily	4-5 days	Daily. The source experiences heavy backfill with data delayed for a couple of weeks. We expect estimates available for the most recent 4-6 days to change substantially in later data revisions (having a median delta of 10% or more). Estimates for dates more than 45 days in the past are expected to remain fairly static (having a median delta of 1% or less), as most major revisions have already occurred.	nationwide Change Healthcare network	Covid	outpatient visit	Data is available for nearly all (99%) of counties. Data is available for all states and some territories.	CC BY-NC See license. DUA uses generic contract terms.
COVID-Related Doctor Visits (Day-adjusted)	Change Healthcare	Estimated percentage of outpatient doctor visits primarily about COVID-related symptoms, based on Change Healthcare claims data that has been de-identified in accordance with HIPAA privacy regulations, smoothed in time using a Gaussian linear smoother, and adjusted to reduce day-of-week effects	USA	county hhs (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-02-01	Ongoing	day	daily	4-5 days	Daily. The source experiences heavy backfill with data delayed for a couple of weeks. We expect estimates available for the most recent 4-6 days to change substantially in later data revisions (having a median delta of 10% or more). Estimates for dates more than 45 days in the past are expected to remain fairly static (having a median delta of 1% or less), as most major revisions have already occurred.	nationwide Change Healthcare network	Covid	outpatient visit	Data is available for nearly all (99%) of counties. Data is available for all states and some territories.	CC BY-NC See license. DUA uses generic contract terms.
COVID-Confirmed Doctor Visits	Change Healthcare	Estimated percentage of outpatient doctor visits with confirmed COVID-19, based on Change Healthcare claims data that has been de-identified in accordance with HIPAA privacy regulations, smoothed in time using a Gaussian linear smoother	USA	county hhs (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-02-01	Ongoing	day	daily	4-5 days	Daily. The source experiences heavy backfill with data delayed for a couple of weeks. We expect estimates available for the most recent 4-6 days to change substantially in later data revisions (having a median delta of 10% or more). Estimates for dates more than 45 days in the past are expected to remain fairly static (having a median delta of 1% or less), as most major revisions have already occurred.	nationwide Change Healthcare network	Covid	outpatient visit	Data is available for nearly all (99%) of counties. Data is available for all states and some territories.	CC BY-NC See license. DUA uses generic contract terms.
COVID-Confirmed Doctor Visits (Day-adjusted)	Change Healthcare	Estimated percentage of outpatient doctor visits with confirmed COVID-19, based on Change Healthcare claims data that has been de-identified in accordance with HIPAA privacy regulations, smoothed in time using a Gaussian linear smoother, and adjusted to reduce day-of-week effects	USA	county hhs (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-02-01	Ongoing	day	daily	4-5 days	Daily. The source experiences heavy backfill with data delayed for a couple of weeks. We expect estimates available for the most recent 4-6 days to change substantially in later data revisions (having a median delta of 10% or more). Estimates for dates more than 45 days in the past are expected to remain fairly static (having a median delta of 1% or less), as most major revisions have already occurred.	nationwide Change Healthcare network	Covid	outpatient visit	Data is available for nearly all (99%) of counties. Data is available for all states and some territories.	CC BY-NC See license. DUA uses generic contract terms.
Influenza-Confirmed Doctor Visits	Change Healthcare	Estimated percentage of outpatient doctor visits with confirmed influenza, based on Change Healthcare claims data that has been de-identified in accordance with HIPAA privacy regulations, smoothed in time using a Gaussian linear smoother	USA	county hhs (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-02-01	Ongoing	day	daily	4-5 days	Daily. The source experiences heavy backfill with data delayed for a couple of weeks. We expect estimates available for the most recent 4-6 days to change substantially in later data revisions (having a median delta of 10% or more). Estimates for dates more than 45 days in the past are expected to remain fairly static (having a median delta of 1% or less), as most major revisions have already occurred.	nationwide Change Healthcare network	Flu	outpatient visit	Data is available for nearly all (99%) of counties. Data is available for all states and some territories.	CC BY-NC See license. DUA uses generic contract terms.
Influenza-Confirmed Doctor Visits (Day-adjusted)	Change Healthcare	Estimated percentage of outpatient doctor visits with confirmed influenza, based on Change Healthcare claims data that has been de-identified in accordance with HIPAA privacy regulations, smoothed in time using a Gaussian linear smoother, and adjusted to reduce day-of-week effects	USA	county hhs (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-02-01	Ongoing	day	daily	4-5 days	Daily. The source experiences heavy backfill with data delayed for a couple of weeks. We expect estimates available for the most recent 4-6 days to change substantially in later data revisions (having a median delta of 10% or more). Estimates for dates more than 45 days in the past are expected to remain fairly static (having a median delta of 1% or less), as most major revisions have already occurred.	nationwide Change Healthcare network	Flu	outpatient visit	Data is available for nearly all (99%) of counties. Data is available for all states and some territories.	CC BY-NC See license. DUA uses generic contract terms.
PCR Test Positivity Rate	Covid Act Now (CAN)	Proportion of PCR specimens tested that have a positive result	USA	county hhs (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-03-01	2021-12-02	day	daily	2-9 days	Daily. Most recent test positivity rates do not change substantially (having a median delta of close to 0). However, most recent total tests performed are expected to increase in later data revisions (having a median increase of 7%). Values more than 5 days in the past are expected to remain fairly static (with total tests performed having a median increase of 1% of less), as most major revisions have already occurred.	Hospital patients	Covid	infected	Data is available for nearly all (99%) of counties. A few counties, most notably in California, are not covered by this data source Data is available for all states.	CC BY-NC See license
Total Number of PCR Tests	Covid Act Now (CAN)	Total number of PCR specimens tested	USA	county hhs (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-03-01	2021-12-02	day	daily	2-9 days	Daily. Most recent test positivity rates do not change substantially (having a median delta of close to 0). However, most recent total tests performed are expected to increase in later data revisions (having a median increase of 7%). Values more than 5 days in the past are expected to remain fairly static (with total tests performed having a median increase of 1% of less), as most major revisions have already occurred.	Hospital patients	Covid	population	Data is available for nearly all (99%) of counties. A few counties, most notably in California, are not covered by this data source Data is available for all states.	CC BY-NC See license
COVID-Related Doctor Visits	Optum	Estimated percentage of outpatient doctor visits that are primarily about COVID-related symptoms, based on data from health system partners, smoothed in time using a Gaussian linear smoother	USA	county hhs (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-02-01	Ongoing	day	daily	3-6 days	Daily. The source experiences heavy backfill with data delayed for a couple of weeks. We expect estimates available for the most recent 5-7 days to change substantially in later data revisions (having a median delta of 10% or more). Estimates for dates more than 50 days in the past are expected to remain fairly static (having a median delta of 1% or less), as most major revisions have already occurred.	nationwide Optum network	Covid	outpatient visit	Data is available for about 80% of counties Data is available for all states and some territories.	CC BY-NC See license. DUA uses generic contract terms.
COVID-Related Doctor Visits (Day-adjusted)	Optum	Estimated percentage of outpatient doctor visits that are primarily about COVID-related symptoms, based on data from health system partners, smoothed in time using a Gaussian linear smoother, and adjusted to reduce day-of-week effects	USA	county hhs (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-02-01	Ongoing	day	daily	3-6 days	Daily. The source experiences heavy backfill with data delayed for a couple of weeks. We expect estimates available for the most recent 5-7 days to change substantially in later data revisions (having a median delta of 10% or more). Estimates for dates more than 50 days in the past are expected to remain fairly static (having a median delta of 1% or less), as most major revisions have already occurred.	nationwide Optum network	Covid	outpatient visit	Data is available for about 80% of counties Data is available for all states and some territories.	CC BY-NC See license. DUA uses generic contract terms.
booster_doses_admin_7dav	US Government	COVID-19 booster vaccine doses administered each day, based on the daily Community Profile Report (CPR) published by the Data Strategy and Execution Workgroup of the White House COVID-19 Team, smoothed in time with a 7-day average. "Doses administered shown by date of report, not date of administration. ... [A] booster dose includes anyone who is fully vaccinated and has received another dose of COVID-19 vaccine since August 13, 2021. This includes people who received booster doses and people who received additional doses." - from the CPR data dictionary.	USA	hhs nation (by Delphi) state	2021-11-01	2023-02-22	day	daily	3-9 days	Daily. This data source is susceptible to large corrections that can create strange data effects such as negative counts and sudden changes of 1M+ counts from one day to the next.		Covid	population	Data is available for all counties and some territorial county equivalents. Data is available for all states and some territories.	Public Domain US Government (https://www.usa.gov/government-works) See license
Confirmed COVID Admissions per day	US Government	All confirmed COVID-19 hospital admissions occurring each day, based on the daily Community Profile Report published by the Data Strategy and Execution Workgroup of the White House COVID-19 Team, smoothed in time with a 7-day average. Other sources of hospital admissions data in COVIDcast include [HHS](https://cmu-delphi.github.io/delphi-epidata/api/covidcast-signals/hhs.html) and [medical insurance claims](https://cmu-delphi.github.io/delphi-epidata/api/covidcast-signals/hospital-admissions.html). The CPR differs from these sources in that it is part of the public health surveillance stream (like HHS, unlike claims) but is available at a daily-county level (like claims, unlike HHS). CPR hospital admissions figures at the state level and above are meant to match those from HHS, but are known to differ. See the [Limitations section of the technical documentation](https://cmu-delphi.github.io/delphi-epidata/api/covidcast-signals/dsew-cpr.html#limitations) for more details.	USA	county hhs msa nation (by Delphi) state	2020-12-16	2023-02-21	day	daily	3-9 days	Daily. This data source is susceptible to large corrections that can create strange data effects such as negative counts and sudden changes of 1M+ counts from one day to the next.		Covid	hospitalized	Data is available for all counties and some territorial county equivalents. Data is available for all states and some territories.	Public Domain US Government (https://www.usa.gov/government-works) See license
Confirmed COVID Admissions per day (per 100k people)	US Government		USA	county hhs msa nation (by Delphi) state	2020-12-16	2023-02-21	day	daily	3-9 days	Daily. This data source is susceptible to large corrections that can create strange data effects such as negative counts and sudden changes of 1M+ counts from one day to the next.		Covid	hospitalized	Data is available for all counties and some territorial county equivalents. Data is available for all states and some territories.	Public Domain US Government (https://www.usa.gov/government-works) See license
doses_admin_7dav	US Government	COVID-19 vaccine doses administered each day, based on the daily Community Profile Report (CPR) published by the Data Strategy and Execution Workgroup of the White House COVID-19 Team, smoothed in time with a 7-day average. "Doses administered shown by date of report, not date of administration." - from the CPR data dictionary.	USA	hhs nation (by Delphi) state	2021-05-02	2023-02-22	day	daily	3-9 days	Daily. This data source is susceptible to large corrections that can create strange data effects such as negative counts and sudden changes of 1M+ counts from one day to the next.		Covid	population	Data is available for all counties and some territorial county equivalents. Data is available for all states and some territories.	Public Domain US Government (https://www.usa.gov/government-works) See license
people_booster_doses	US Government	Cumulative number of people who have received a booster dose of the COVID-19 vaccine, based on the daily Community Profile Report (CPR) published by the Data Strategy and Execution Workgroup of the White House COVID-19 Team, smoothed in time with a 7-day average. "The count of people who received a booster dose includes anyone who is fully vaccinated and has received another dose of COVID-19 vaccine since 2021-08-13. This includes people who received booster doses and people who received additional doses" - from the CPR data dictionary.	USA	hhs nation (by Delphi) state	2021-11-01	2023-02-22	day	daily	3-9 days	Daily. This data source is susceptible to large corrections that can create strange data effects such as negative counts and sudden changes of 1M+ counts from one day to the next.		Covid	population	Data is available for all counties and some territorial county equivalents. Data is available for all states and some territories.	Public Domain US Government (https://www.usa.gov/government-works) See license
people_full_vaccinated	US Government	Cumulative number of people who have received a full course of the COVID-19 vaccine, based on the daily Community Profile Report (CPR) published by the Data Strategy and Execution Workgroup of the White House COVID-19 Team, smoothed in time with a 7-day average. "People fully vaccinated includes those who have received two doses of the Pfizer-BioNTech or Moderna vaccine and those who have received one dose of the J&J/Janssen vaccine" - from the CPR data dictionary.	USA	county hhs msa nation (by Delphi) state	2021-01-15	2023-02-22	day	daily	3-9 days	Daily. This data source is susceptible to large corrections that can create strange data effects such as negative counts and sudden changes of 1M+ counts from one day to the next.		Covid	population	Data is available for all counties and some territorial county equivalents. Data is available for all states and some territories.	Public Domain US Government (https://www.usa.gov/government-works) See license
COVID-Like Symptoms	Delphi/Meta	Estimated percentage of people with COVID-like illness For this signal, we estimate the percentage of people self-reporting COVID-like symptoms, defined here as fever along with either cough, shortness of breath, or difficulty breathing. While many other conditions can cause these symptoms, comparing the rates of COVID-like symptoms across the country can suggest where COVID is most active.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-04-06	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	symptomatic	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
COVID-Like Symptoms (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-04-06	2022-06-26	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	symptomatic	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
COVID-Like Symptoms (Unweighted 7-day average)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-04-06	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	symptomatic	Data is available for about 50% of counties. Data is available for all states and some territories. Availability declines over time as survey response rate decreases	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
COVID-Like Symptoms (7-day average)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-04-06	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	symptomatic	Data is available for about 50% of counties. Data is available for all states and some territories. Availability declines over time as survey response rate decreases	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
COVID-Like Symptoms in Community	Delphi/Meta	Estimated percentage of people reporting illness in their local community We also ask them if they know anyone in their local community who has COVID-like symptoms, defined here as fever along with either cough, shortness of breath, or difficulty breathing. For this indicator, we estimate the percentage of people who know someone, in their household or outside it, who has these symptoms. While many conditions can cause these symptoms, not just COVID, comparing the rates across the country can suggest where COVID is most active.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-04-15	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	symptomatic	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
COVID-Like Symptoms in Community (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-04-15	2022-06-26	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	symptomatic	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
COVID-Like Symptoms in Community (Unweighted 7-day average)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-04-15	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	symptomatic	Data is available for about 40% of counties. Data is available for all states and some territories. Availability declines over time as survey response rate decreases	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
COVID-Like Symptoms in Community (7-day average)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-04-15	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	symptomatic	Data is available for about 35% of counties. Data is available for all states and some territories. Availability declines over time as survey response rate decreases	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Flu-Like Symptoms	Delphi/Meta	Estimated percentage of people with influenza-like illness For this signal, we estimate the percentage of people self-reporting influenza-like symptoms, defined here as fever along with either cough or sore throat. While many other conditions can cause these symptoms, comparing the rates of influenza-like symptoms across the country can suggest where the flu is most active.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-04-06	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Flu	symptomatic	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Flu-Like Symptoms (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-04-06	2022-06-26	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Flu	symptomatic	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Flu-Like Symptoms (Unweighted 7-day average)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-04-06	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Flu	symptomatic	Data is available for about 50% of counties. Data is available for all states and some territories. Availability declines over time as survey response rate decreases	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Flu-Like Symptoms (7-day average)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-04-06	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Flu	symptomatic	Data is available for about 50% of counties. Data is available for all states and some territories. Availability declines over time as survey response rate decreases	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
COVID-Like Symptoms in Community Outside Household	Delphi/Meta	Estimated percentage of people reporting illness in their local community not including their household We also ask them if they know anyone in their local community who has COVID-like symptoms, defined here as fever along with either cough, shortness of breath, or difficulty breathing. For this indicator, we estimate the percentage of people who know someone outside their household who has these symptoms. While many conditions can cause these symptoms, not just COVID, comparing the rates across the country can suggest where COVID is most active.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-04-15	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	symptomatic	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
COVID-Like Symptoms in Community Outside Household (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-04-15	2022-06-26	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	symptomatic	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
COVID-Like Symptoms in Community Outside Household (Unweighted 7-day average)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-04-15	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	symptomatic	Data is available for about 40% of counties. Data is available for all states and some territories. Availability declines over time as survey response rate decreases	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
COVID-Like Symptoms in Community Outside Household (7-day average)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-04-15	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	symptomatic	Data is available for about 35% of counties. Data is available for all states and some territories. Availability declines over time as survey response rate decreases	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
COVID-19 Vaccine Acceptance	Delphi/Meta	Estimated percentage of respondents who would definitely or probably choose to get vaccinated, if a COVID-19 vaccine were offered to them today. We also ask questions about well-being and various mitigation measures, including vaccine acceptance. For this signal, we estimate the percentage of people who would "definitely" or "probably" choose to be vaccinated if a COVID vaccine were offered to them today. Note: Until January 6, 2021, all respondents answered this question; beginning on that date, only respondents who said they have not received a COVID vaccine are asked this question. Discontinued as of Wave 11, May 19, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-12-20	2021-08-08	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
COVID-19 Vaccine Acceptance (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-12-20	2021-08-08	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
COVID-19 Vaccine Acceptance Among Unvaccinated	Delphi/Meta	Estimated percentage of respondents who would definitely or probably choose to get vaccinated, if a vaccine were offered to them today, among respondents who have not yet been vaccinated and do not have an appointment to do so. Based on survey item V3a. This item was shown to respondents starting in Wave 11, May 19, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-05-20	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
COVID-19 Vaccine Acceptance Among Unvaccinated (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-05-20	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Anxious (Last Five Days)	Delphi/Meta	Estimated percentage of respondents who reported feeling "nervous, anxious, or on edge" for most or all of the past 5 days. Discontinued as of Wave 10, March 2, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-09-08	2021-03-18	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Anxious (Last Five Days) (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-09-08	2021-03-18	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Anxious (Last Seven Days)	Delphi/Meta	Estimated percentage of respondents who reported feeling "nervous, anxious, or on edge" for most or all of the past 7 days. This item was shown to respondents starting in Wave 10, March 2, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-03-02	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Anxious (Last Seven Days) (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-03-02	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
COVID-19 Vaccine Appointments Among Unvaccinated	Delphi/Meta	Estimated percentage of respondents who have an appointment to get a COVID-19 vaccine, among respondents who have not yet been vaccinated. Based on survey item V11a. This item was shown to respondents starting in Wave 11, May 19, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-05-20	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
COVID-19 Vaccine Appointments Among Unvaccinated (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-05-20	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
COVID-19 Vaccine Acceptance and Appointments Among Unvaccinated	Delphi/Meta	Estimated percentage of respondents who either have an appointment to get a COVID-19 vaccine or would definitely or probably choose to get vaccinated, if a vaccine were offered to them today, among respondents who have not yet been vaccinated Based on survey items V11a and V3a. V11a was shown to respondents starting in Wave 11, May 19, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-05-20	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
COVID-19 Vaccine Acceptance and Appointments Among Unvaccinated (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-05-20	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Belief Children Can't Get COVID-19	Delphi/Meta	Estimated percentage of people who believe that the statement “Children cannot get COVID-19” is definitely or probably true. Based on survey item I2. This item was shown to respondents starting in Wave 11, May 19, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-05-20	2022-02-19	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Belief Children Can't Get COVID-19 (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-05-20	2022-02-19	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Belief COVID-19 Deliberately Created to Manipulate Events	Delphi/Meta	Estimated percentage of people who believe that the statement “COVID-19 was deliberately created by a small group of people who secretly manipulate world events” is definitely or probably true. Based on survey item I3. This item was shown to respondents starting in Wave 11, May 19, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-05-20	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Belief COVID-19 Deliberately Created to Manipulate Events (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-05-20	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Belief Social Distancing is Effective	Delphi/Meta	Estimated percentage of respondents who believe that social distancing is either very or moderately effective for preventing the spread of COVID-19. Based on survey item G2. This item was shown to respondents starting in Wave 11, May 19, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-05-20	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Belief Social Distancing is Effective (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-05-20	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Belief COVID-19 Exploited to Control People	Delphi/Meta	Estimated percentage of people who indicate that the statement “The COVID-19 pandemic is being exploited by the government to control people” is definitely or probably true. Based on survey item I4. This item was shown to respondents starting in Wave 11, May 19, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-05-20	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Belief COVID-19 Exploited to Control People (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-05-20	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Belief Masks Are Effective	Delphi/Meta	Estimated percentage of respondents who believe that wearing a face mask is either very or moderately effective for preventing the spread of COVID-19. Based on survey item G2. This item was shown to respondents starting in Wave 11, May 19, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-06-04	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Belief Masks Are Effective (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-06-04	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Belief Vaccines Make Masks Unnecessary	Delphi/Meta	Estimated percentage of people who believe that the statement “Getting the COVID-19 vaccine means that you can stop wearing a mask around people outside your household” is definitely or probably true. Based on survey item I1. This item was shown to respondents starting in Wave 11, May 19, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-05-20	2022-02-19	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Belief Vaccines Make Masks Unnecessary (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-05-20	2022-02-19	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
COVID-19 Vaccinated	Delphi/Meta	Estimated percentage of respondents who have already received a vaccine for COVID-19. Note: The Centers for Disease Control compiles data on vaccine administration across the United States. This signal may differ from CDC data because of survey biases and should not be treated as authoritative. However, the survey signal is not subject to the lags and reporting problems in official vaccination data.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-01-06	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
COVID-19 Vaccinated (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-01-06	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
COVID-19 Vaccine Acceptance: Vaccinated, Appointment, or Accept	Delphi/Meta	Estimated percentage of respondents who either have already received a COVID vaccine, have an appointment to receive a COVID vaccine, or would definitely or probably choose to receive one if it were offered to them today.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-05-20	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
COVID-19 Vaccine Acceptance: Vaccinated, Appointment, or Accept (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-05-20	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Friends and Family Vaccinated	Delphi/Meta	Estimated percentage of respondents who report that most of their friends and family have received a COVID-19 vaccine. Based on survey item H3. This item was shown to respondents starting in Wave 11, May 19, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-05-20	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Friends and Family Vaccinated (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-05-20	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
COVID-19 Vaccinated or Vaccine Acceptance	Delphi/Meta	Estimated percentage of respondents who either have already received a COVID vaccine or would definitely or probably choose to get vaccinated, if a vaccine were offered to them today. Discontinued as of Wave 11, May 19, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-12-20	2021-08-08	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
COVID-19 Vaccinated or Vaccine Acceptance (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-12-20	2021-08-08	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Delayed Healthcare Due to Cost	Delphi/Meta	Estimated percentage of respondents who have ever delayed or not sought medical care in the past year because of cost. Based on survey item K1. This item was shown to respondents starting in Wave 11, May 19, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-05-20	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Delayed Healthcare Due to Cost (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-05-20	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Depressed (Last Five Days)	Delphi/Meta	Estimated percentage of respondents who reported feeling depressed for most or all of the past 5 days. Discontinued as of Wave 10, March 2, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-09-08	2021-03-18	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Depressed (Last Five Days) (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-09-08	2021-03-18	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Depressed (Last Seven Days)	Delphi/Meta	Estimated percentage of respondents who reported feeling depressed for most or all of the past 7 days. This item was shown to respondents starting in Wave 10, March 2, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-03-02	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Depressed (Last Seven Days) (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-03-02	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Not Needed: Do Not Spend Time	Delphi/Meta	Estimated percentage of respondents who say they don't need to get a COVID-19 vaccine because they don't spend time with high-risk people, among respondents who provided at least one reason for why they believe a COVID-19 vaccine is unnecessary.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Not Needed: Do Not Spend Time (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Not Needed: Had Covid	Delphi/Meta	Estimated percentage of respondents who say they don't need to get a COVID-19 vaccine because they already had the illness, among respondents who provided at least one reason for why they believe a COVID-19 vaccine is unnecessary.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Not Needed: Had Covid (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Not Needed: Not Beneficial	Delphi/Meta	Estimated percentage of respondents who say they don't need to get a COVID-19 vaccine because they don't think vaccines are beneficial, among respondents who provided at least one reason for why they believe a COVID-19 vaccine is unnecessary.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Not Needed: Not Beneficial (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Not Needed: Not High Risk	Delphi/Meta	Estimated percentage of respondents who say they don't need to get a COVID-19 vaccine because they are not in a high-risk group, among respondents who provided at least one reason for why they believe a COVID-19 vaccine is unnecessary.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Not Needed: Not High Risk (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Not Needed: Not Serious	Delphi/Meta	Estimated percentage of respondents who say they don't need to get a COVID-19 vaccine because they don't believe COVID-19 is a serious illness, among respondents who provided at least one reason for why they believe a COVID-19 vaccine is unnecessary.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Not Needed: Not Serious (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Not Needed: Other	Delphi/Meta	Estimated percentage of respondents who say they don't need to get a COVID-19 vaccine for another reason, among respondents who provided at least one reason for why they believe a COVID-19 vaccine is unnecessary.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Not Needed: Other (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Not Needed: Precautions	Delphi/Meta	Estimated percentage of respondents who say they don't need to get a COVID-19 vaccine because they will use other precautions, such as a mask, instead, among respondents who provided at least one reason for why they believe a COVID-19 vaccine is unnecessary.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Not Needed: Precautions (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Felt Isolated (Last Five Days)	Delphi/Meta	Estimated percentage of respondents who reported feeling "isolated from others" for most or all of the past 5 days. Discontinued as of Wave 10, March 2, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-09-08	2021-03-18	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Felt Isolated (Last Five Days) (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-09-08	2021-03-18	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Felt Isolated (Last Seven Days)	Delphi/Meta	Estimated percentage of respondents who reported feeling "isolated from others" for most or all of the past 7 days. This item was shown to respondents starting in Wave 10, March 2, 2021. Discontinued as of Wave 11, May 19, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-03-02	2021-08-08	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Felt Isolated (Last Seven Days) (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-03-02	2021-08-08	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Ever Had COVID-19	Delphi/Meta	Estimated percentage of people who report having ever had COVID-19. Based on survey item B13. This item was shown to respondents starting in Wave 11, May 19, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-05-20	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	ascertained (case)	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Ever Had COVID-19 (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-05-20	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	ascertained (case)	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Allergic	Delphi/Meta	Estimated percentage of respondents who say they are hesitant to get vaccinated because they are worried about having an allergic reaction, among respondents who answered "Yes, probably", "No, probably not", or "No, definitely not" when asked if they would get vaccinated if offered. This item was shown to respondents starting in Wave 8, February 8, 2021. Discontinued as of Wave 11, May 19, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2021-08-08	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Allergic (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2021-08-08	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Cost	Delphi/Meta	Estimated percentage of respondents who say they are hesitant to get vaccinated because they are worried about the cost, among respondents who answered "Yes, probably", "No, probably not", or "No, definitely not" when asked if they would get vaccinated if offered. This item was shown to respondents starting in Wave 8, February 8, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Cost (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Dislike Vaccines	Delphi/Meta	Estimated percentage of respondents who say they are hesitant to get vaccinated because they dislike vaccines, among respondents who answered "Yes, probably", "No, probably not", or "No, definitely not" when asked if they would get vaccinated if offered. This item was shown to respondents starting in Wave 8, February 8, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2021-12-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Dislike Vaccines (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2021-12-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitance: Dislike Vaccines Generally	Delphi/Meta	Estimated percentage of respondents who say they are hesitant to get vaccinated because they dislike vaccines generally, among respondents who answered "Yes, probably", "No, probably not", or "No, definitely not" when asked if they would get vaccinated if offered. This item was shown to respondents starting in Wave 12, December 19, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-12-19	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitance: Dislike Vaccines Generally (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-12-19	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Distrust Government	Delphi/Meta	Estimated percentage of respondents who say they are hesitant to get vaccinated because they don't trust the government, among respondents who answered "Yes, probably", "No, probably not", or "No, definitely not" when asked if they would get vaccinated if offered. This item was shown to respondents starting in Wave 8, February 8, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Distrust Government (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Distrust Vaccines	Delphi/Meta	Estimated percentage of respondents who say they are hesitant to get vaccinated because they don't trust COVID-19 vaccines, among respondents who answered "Yes, probably", "No, probably not", or "No, definitely not" when asked if they would get vaccinated if offered. This item was shown to respondents starting in Wave 8, February 8, 2021. Discontinued as of Wave 11, May 19, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Distrust Vaccines (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Health Condition	Delphi/Meta	Estimated percentage of respondents who say they are hesitant to get vaccinated because they have a health condition that may impact the safety of a COVID-19 vaccine, among respondents who answered "Yes, probably", "No, probably not", or "No, definitely not" when asked if they would get vaccinated if offered. This item was shown to respondents starting in Wave 8, February 8, 2021. Discontinued as of Wave 11, May 19, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2021-08-08	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Health Condition (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2021-08-08	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Ineffective	Delphi/Meta	Estimated percentage of respondents who say they are hesitant to get vaccinated because they don't know if a COVID-19 vaccine will work, among respondents who answered "Yes, probably", "No, probably not", or "No, definitely not" when asked if they would get vaccinated if offered. This item was shown to respondents starting in Wave 8, February 8, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Ineffective (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Low Priority	Delphi/Meta	Estimated percentage of respondents who say they are hesitant to get vaccinated because they think other people need it more than they do, among respondents who answered "Yes, probably", "No, probably not", or "No, definitely not" when asked if they would get vaccinated if offered. This item was shown to respondents starting in Wave 8, February 8, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Low Priority (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Was Not Recommended	Delphi/Meta	Estimated percentage of respondents who say they are hesitant to get vaccinated because their doctor did not recommend it, among respondents who answered "Yes, probably", "No, probably not", or "No, definitely not" when asked if they would get vaccinated if offered. This item was shown to respondents starting in Wave 8, February 8, 2021. Discontinued as of Wave 11, May 19, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2021-08-08	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Was Not Recommended (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2021-08-08	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Other	Delphi/Meta	Estimated percentage of respondents who say they are hesitant to get vaccinated for another reason, among respondents who answered "Yes, probably", "No, probably not", or "No, definitely not" when asked if they would get vaccinated if offered. This item was shown to respondents starting in Wave 8, February 8, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Other (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Pregnant	Delphi/Meta	Estimated percentage of respondents who say they are hesitant to get vaccinated because they are pregnant or breastfeeding, among respondents who answered "Yes, probably", "No, probably not", or "No, definitely not" when asked if they would get vaccinated if offered. This item was shown to respondents starting in Wave 8, February 8, 2021. Discontinued as of Wave 11, May 19, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2021-08-08	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Pregnant (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2021-08-08	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Religious	Delphi/Meta	Estimated percentage of respondents who say they are hesitant to get vaccinated because it is against their religious beliefs, among respondents who answered "Yes, probably", "No, probably not", or "No, definitely not" when asked if they would get vaccinated if offered. This item was shown to respondents starting in Wave 8, February 8, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Religious (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Side Effects	Delphi/Meta	Estimated percentage of respondents who say they are hesitant to get vaccinated because they are worried about side effects, among respondents who answered "Yes, probably", "No, probably not", or "No, definitely not" when asked if they would get vaccinated if offered. This item was shown to respondents starting in Wave 8, February 8, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Side Effects (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Unnecessary	Delphi/Meta	Estimated percentage of respondents who say they are hesitant to get vaccinated because they don't believe they need a COVID-19 vaccine, among respondents who answered "Yes, probably", "No, probably not", or "No, definitely not" when asked if they would get vaccinated if offered. This item was shown to respondents starting in Wave 8, February 8, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Unnecessary (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Wait For Safety	Delphi/Meta	Estimated percentage of respondents who say they are hesitant to get vaccinated because they want to wait to see if the COVID-19 vaccines are safe, among respondents who answered "Yes, probably", "No, probably not", or "No, definitely not" when asked if they would get vaccinated if offered. This item was shown to respondents starting in Wave 8, February 8, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Vaccine Hesitancy: Wait For Safety (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-02-09	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
In-person School Full-time	Delphi/Meta	Estimated percentage of people who had any children attending in-person school on a full-time basis, among people reporting any pre-K-grade 12 children in their household.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-11-24	2021-12-24	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
In-person School Full-time (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-11-24	2021-12-24	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
In-person School Full-time (Oldest Child)	Delphi/Meta	Estimated percentage of people whose oldest child is attending in-person school on a full-time basis, among people reporting any pre-K-grade 12 children in their household. This item was shown to respondents starting in Wave 12, December 19, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-12-19	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
In-person School Full-time (Oldest Child) (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-12-19	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
In-person School Part-time	Delphi/Meta	Estimated percentage of people who had any children attending in-person school on a part-time basis, among people reporting any pre-K-grade 12 children in their household.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-11-24	2021-12-24	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
In-person School Part-time (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-11-24	2021-12-24	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
In-person School Part-time (Oldest Child)	Delphi/Meta	Estimated percentage of people whose oldest child is attending in-person school on a part-time basis, among people reporting any pre-K-grade 12 children in their household. This item was shown to respondents starting in Wave 12, December 19, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-12-19	2022-06-25	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
In-person School Part-time (Oldest Child) (Unweighted)	Delphi/Meta		USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2021-12-19	2022-06-27	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.
Large Event (Last 24 Hours)	Delphi/Meta	Estimated percentage of respondents who "attended an event with more than 10 people" in the past 24 hours. This item was shown to respondents starting in Wave 4, September 8, 2020. Discontinued as of Wave 10, March 2, 2021.	USA	county (by Delphi) hrr (by Delphi) msa (by Delphi) nation (by Delphi) state (by Delphi)	2020-09-08	2021-03-18	day	daily	1 day	Daily, for 5 consecutive issues for each report date	Adult Facebook users	Covid	population	Geographic coverage varies widely by signal, with anywhere from 0.4% to 25% of counties available and 15% to 100% of states. A handful of signals are available for 40-50% of counties, and all states and some territories. Signals based on questions that were asked to a subset of survey respondents are available for fewer locations. Availability declines over time as survey response rate decreases. A missing value indicates no valid data OR, for test positivity, that the value was censored due to small sample size (<= 5)	CC BY Aggregationed signals must be based on 100 or more survey responses. Delphi aggregated data has no use restrictions. Raw data users must sign DUA with Delphi, and the proposed research purpose must be consistent with the consent language used in Wave 1, regardless of which survey wave the data they're using comes from. Part- or full-time Facebook employees are not eligible to receive data access.

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