
Nate Silver @NateSilver538
Why? Because in clinical trials, participants were required to have no known history of COVID infection. In real life, a lot of the unvaccinated/"control" group will have antibodies, however. Most studies I've seen don't adjust for this. https://t.co/jn3iJw982r https://t.co/GWZ4mZ44K6 — PolitiTweet.org