I will say (unscientifically, before someone feels the need to point that out) that I have been supplementing vitamin D and zinc prophylactically since March 20

I will say (unscientifically, before someone feels the need to point that out) that I have been supplementing vitamin D and zinc prophylactically since March 2020. Not in any crazy amounts. I have had three household members become infected, and I used a public gym every other day throughout except when quarantining with the sick household. Masking was quite inconsistent at the gym to say the least (maybe one in ten patrons wore them). I was not vaccinated until late July of this year. Never contracted COVID 19, confirmed by blood test shortly before I was vaccinated. I don't know if that means I have been lucky, or if it's possible I was exposed but did not develop COVID-specific antibodies that would be detected in the blood test.