Blog

News, findings, and musings from the team

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

Sep 18
COVID-19 Symptom Surveys through Google

COVID-19 Symptom Surveys through Google

Since April 2020, in addition to our massive daily survey advertised on Facebook, we’ve been running (even-more-massive) surveys through Google …

#symptom surveys #COVIDcast #R

By Ryan Tibshirani

Aug 26
COVID-19 Symptom Surveys through Facebook

COVID-19 Symptom Surveys through Facebook

Since April 2020, in collaboration with Facebook, partner universities, and public health officials, we’ve been conducting a massive daily …

#symptom surveys #COVIDcast #R

By Alex Reinhart and Ryan Tibshirani

Aug 10
Hello World!

Hello World!

Hello from the Delphi research group at Carnegie Mellon University! We’re a group of faculty, students, and staff, based primarily out of CMU …

#COVIDcast

By Roni Rosenfeld and Ryan Tibshirani