New COVID-19 survey: Help researchers understand why some people get severe disease, whereas others get mild disease or no symptoms at all.
https://t.co/iof3WkINUU
The app will be down for maintenance Wednesday, May 23rd, starting at 9am EDT. This downtime may last for several hours. We are moving the site to a new address that should be easier to remember and also help reduce access issues for mobile users - stay tuned for details!