I got my latest Pfizer Covid shot and the latest flue shot, along with some shot for something called KPR or something like that, 10 days ago in Seattle and am feeling just great. No, I didn't get Covid any time after a Covid shot, although I did catch it several years ago after flying from Guad to Seattle and being exposed to many passengers.
Who knows, maybe I was just lucky or maybe the quality of my shots was better. Who knows.