Blog

News, findings, and musings from the team

Mar 10
Cases2Beds: A Case Study in Actionable Intelligence

Cases2Beds: A Case Study in Actionable Intelligence

In our partnership with the Allegheny County Health Department, we explored avariety of solutions to different pressing challenges during the …

#hospital utilization #actionable intelligence #Excel #Allegheny County

By Ananya Joshi, Roni Rosenfeld, and Chris Scott

Feb 2
Home for the Holidays? The Impact of US Holidays on Social Behaviors and Preventative Measures

Home for the Holidays? The Impact of US Holidays on Social Behaviors and Preventative Measures

How did Thanksgiving and Christmas affect travel, social, and preventative behaviors in the USA during the COVID-19 pandemic?

#COVIDcast #symptom surveys #R

By Leanna Morinishi, Kris Barkume, Esther Kim, and Alex Reinhart

Jan 28
Unpacking the Drop in COVID-19 Case Fatality Rates

Unpacking the Drop in COVID-19 Case Fatality Rates

Since the pandemic started, case fatality has plummeted. But how much can we attribute this drop to treatment improvements versus increased testing, …

#CDC data #FDOH data #time series

By Helen Zhou, Cheng Cheng, Jeremy C. Weiss, Zachary C. Lipton

Jan 28
Using the COVID-19 Symptom Survey to Track Vaccination Uptake and Sentiment in the United States

Using the COVID-19 Symptom Survey to Track Vaccination Uptake and Sentiment in the United States

Data from the Symptom Survey reveal how COVID-19 vaccinations are rolling out across the nation.

#COVIDcast #R #symptom surveys #vaccine

By Alex Reinhart, Esther Kim, Andy Garcia, Sarah LaRocca

Jan 19
Causal Inference for Social Mobility and COVID-19

Causal Inference for Social Mobility and COVID-19

How can we estimate the causal effect of mobility on COVID-19 when there could be many confounding variables?

#COVIDcast

By Matteo Bonvini, Edward Kennedy, Valérie Ventura, and Larry Wasserman

Dec 13
Are Masks Widely Used in Public?

Are Masks Widely Used in Public?

Delphi’s symptom surveys reveal rates of mask use across the country. But do they really show that the vast majority of people wear masks?

#symptom surveys #COVIDcast #R

By Alex Reinhart

Nov 5
A Syndromic COVID-19 Indicator Based on Insurance Claims of Outpatient Visits

A Syndromic COVID-19 Indicator Based on Insurance Claims of Outpatient Visits

In previous posts, we discussed our massive ongoing symptom surveys that have reached over 12 million people in the U.S. since April 2020, in …

#medical records #COVIDcast #R

By Aaron Rumack and Roni Rosenfeld

Oct 12
New and Improved COVID Symptom Survey Tracks Testing and Mask-Wearing

New and Improved COVID Symptom Survey Tracks Testing and Mask-Wearing

Beginning on September 8, 2020, we deployed a new version of our symptom survey. Facebook helps us recruit tens of thousands of respondents daily, and …

#symptom surveys #COVIDcast #R

By Alex Reinhart

Oct 7
Accessing Open COVID-19 Data via the COVIDcast Epidata API

Accessing Open COVID-19 Data via the COVIDcast Epidata API

One of our primary initiatives at the Delphi COVIDcast project has been to curate a diverse set of COVID-related data streams, and to make them freely …

#COVIDcast API #COVIDcast #R #Python

By Kathryn Mazaitis and Alex Reinhart

Sep 21
Can Symptoms Surveys Improve COVID-19 Forecasts?

Can Symptoms Surveys Improve COVID-19 Forecasts?

Building on our previous two posts (on our COVID-19 symptom surveys through Facebook and Google) this post offers a deeper dive into empirical …

#symptom surveys #forecasting #COVIDcast #R

By Ryan Tibshirani