CHANGE: FDA OKs second Pfizer, Moderna booster shot in vulnerable Americans. I have a friend who has had two shots of Pfizer and also had Covid, and she shows no antibodies, probably due to the immuno suppressive drugs she takes for MS. She’d be a candidate, but if the two shots and the actual disease don’t do it, why should one more shot?

On the upside, she wasn’t especially sick when she actually had Covid.