I'm not sure how that contradicts what I said? Most of the people in the COVID-19 group tested positive before the vaccines were approved in December 2020. Yes,

I'm not sure how that contradicts what I said? Most of the people in the COVID-19 group tested positive before the vaccines were approved in December 2020. Yes, they might have been vaccinated afterwards, but my point is they did not have vaccine-induced antibodies at the time of their infections.