Nate Silver @NateSilver538
It's ambiguous what including antibody tests will do to the positive test RATE. Since they measure, more or less, whether you EVER had the disease, they may produce a *higher* positive % than viral tests, which measure if you CURRENTLY have it. See e.g.: https://t.co/1oSb5eV4XL https://t.co/6f16rh8mpp — PolitiTweet.org