Blog
News, findings, and musings from the team
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
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
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
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?
By Matteo Bonvini, Edward Kennedy, Valérie Ventura, and Larry Wasserman
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
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
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
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
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
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