[jointpdf]

I had the same question about retesting. Here’s a quote from Scott Gottlieb (former FDA commissioner):

“While all of these tests can still generate false positives—a finding that you have the antibodies when you don’t—that risk can be sharply reduced by repeating the test if it comes back positive. The predictive value of two consecutive positive tests is high enough that you can be confident antibodies are present.”

https://www.wsj.com/articles/antibody-knowledge-can-be-power...