4x4mechanic
Web Wheeler...
The week of Christmas '19 I was sick as a dog, fever, chills, etc. but wrote it off as the good ol' flu bug. Nobody knew jack about Covid then...You still could have had a mild case of it, never remembering any sniffles or anything at all?
Antibodies fade, Tcells last. Unless you spend $350 for a Tdetect, you can't rely on antibody tests.
My PA says "Nope, test was 100% negative, you didn't have it..." Good enough for me.