
Nate Silver @NateSilver538
@karlbykarlsmith @DKThomp @robbysoave I think what you'd probably want (maybe in addition to other options) is proof of antibodies. If someone tests positive with an at-home test, stays home for 10 days with a mild case, there may never be any official record they had COVID. But they should still be antibody+. — PolitiTweet.org