The US COVID-19 Trends and Impact Survey Continuous real-time measurement of COVID-19 symptoms, risks, protective behaviors, testing, and vaccination
The US COVID-19 Trends and Impact Survey (CTIS) is a large, cross-sectional, internet-based survey that has operated continuously since April 6, 2020. By inviting a random sample of Facebook active users each day, CTIS collects information about COVID-19 symptoms, risks, mitigating behaviors, mental...
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Published in | Proceedings of the National Academy of Sciences - PNAS Vol. 118; no. 51; pp. 1 - 9 |
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Main Authors | , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
National Academy of Sciences
21.12.2021
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Series | Beyond Cases and Deaths: The Benefits of Auxiliary Data Streams In Tracking the COVID-19 Pandemic |
Subjects | |
Online Access | Get full text |
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