Merge pull request #531 from cmu-delphi/surveys/pnas

Link to PNAS papers on public site

Author: krivard

content/covid19/_index.md

@@ -4,11 +4,11 @@ linkTitle: COVID-19
 layout: single
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-In March 2020, Delphi pivoted from seasonal epidemic forecasting to COVID-19 tracking. Since then, we’ve created and maintained the nation’s largest public repository of diverse, geographically-detailed, real-time indicators of COVID-19 activity in the U.S. Our indicators cover every rung of the severity pyramid, and are freely available through our public API or our data export tool.
+In March 2020, Delphi pivoted from seasonal epidemic forecasting to COVID-19 tracking. Since then, we’ve created and maintained the nation’s largest public repository of diverse, geographically-detailed, real-time indicators of COVID-19 activity in the U.S. Our indicators cover every rung of the severity pyramid, and are freely available through [our public API]({{< apiref "api/covidcast.html" >}}) or our [data export tool]({{< relref "covidcast/export" >}}).
 
 Several of the underlying data sources (on which these indicators are built) would not exist or be publicly available without our efforts. This includes:
 
-* A massive national daily survey we’re running in partnership with Facebook. Over 20 million Americans have answered the survey since April 2020, providing real-time insights into, e.g., self-reported symptoms, mask wearing, testing, and contacts, all broken down by various demographics.
+* A [massive national daily survey]({{< relref "covid19/ctis" >}}) we’re running in partnership with Facebook. Over 20 million Americans have answered the survey since April 2020, providing real-time insights into, e.g., self-reported symptoms, mask wearing, testing, and contacts, all broken down by various demographics.
 * An enormous database of medical insurance claims that have been de-identified in accordance with HIPAA privacy regulations, covering more than half the US population, made possible through health system partners including Change Healthcare. We use this to produce a new syndromic COVID-19 indicator based on doctor visits, and other indicators based on hospitalizations and ICU admissions.
 
-We have selected a small number of indicators to showcase in COVIDcast, a visualization system that helps place pandemic activity in geographic and temporal context. It includes a notion of correlation across time, for example, a spike in cases is often followed by a spike in hospital admissions some number of days later.
+An overview of our work and data was [published in the *Proceedings of the National Academy of Sciences*](https://doi.org/10.1073/pnas.2111452118). We have selected a small number of indicators to showcase in [COVIDcast]({{< relref "covidcast" >}}), a visualization system that helps place pandemic activity in geographic and temporal context. It includes a notion of correlation across time, for example, a spike in cases is often followed by a spike in hospital admissions some number of days later.

content/covid19/ctis.md

@@ -58,6 +58,13 @@ The [Symptom Data Challenge](https://www.symptomchallenge.org/) challenged parti
 
 ### Publications
 
+- J. Salomon, A. Reinhart, A. Bilinski, E. J. Chua, W. La Motte-Kerr, M. M.
+  Rönn, M. B. Reitsma, K. A. Morris, S. LaRocca, T. H. Farag, F. Kreuter, R.
+  Rosenfeld, and R. J. Tibshirani (2021). [The US COVID-19 Trends and Impact
+  Survey: Continuous real-time measurement of COVID-19 symptoms, risks,
+  protective behaviors, testing, and
+  vaccination](https://doi.org/10.1073/pnas.2111454118). *Proceedings of the
+  National Academy of Sciences* 118 (51) e2111454118.
 - D. P. Do and R. Frank (2021). [U.S. frontline workers and COVID-19 inequities](https://doi.org/10.1016/j.ypmed.2021.106833). *Preventive Medicine* 153, 106833.
 - W. C. King, M. Rubinstein, A. Reinhart, and R. J. Mejia (2021). [COVID-19 vaccine hesitancy January-May 2021 among 18–64 year old US adults by employment and occupation](https://doi.org/10.1016/j.pmedr.2021.101569). *Preventive Medicine Reports* 24, 101569.
 - C. H. Sudre, A. Keshet, M. S. Graham, A. D. Joshi, S. Shilo, H. Rossman, B. Murray, E. Molteni, K. Klaser, L. D. Canas, M. Antonelli, L. H. Nguyen, D. A. Drew, M. Modat, J. Capdevila Pujol, S. Ganesh, J. Wolf, T. Meir, A. T. Chan, C. J. Steves, T. D. Spector, J. S. Brownstein, E. Segal, S. Ourselin, and C. M. Astley (2021). [Anosmia, ageusia, and other COVID-19-like symptoms in association with a positive SARS-CoV-2 test, across six national digital surveillance platforms: an observational study](https://doi.org/10.1016/S2589-7500(21)00115-1). *The Lancet Digital Health* 3 (9), e577-e586.