I worked continuously through covid, surrounded by folks who got it again and again, but I never did. As others have mentioned, I contend the quercetin, D3, and zinc did the trick!
And you are probably correct
Ditto that...and I work sometimes in a small Hosp.
My daughter’s had it 3x, my wife 2x, son 1x, but I kept testing negative. Maybe I did get it and just never knew. Maybe it’s my medicinal pint of daily beer. My trust is in that.