I'm really sorry, I linked the wrong article. The quote in my comment is from the abstract of this [1] study. It's a meta-analysis by a professor of epidemiol

I'm really sorry, I linked the wrong article. The quote in my comment is from the abstract of this [1] study. It's a meta-analysis by a professor of epidemiology at Yale. He also wrote an op-ed that ran in Newsweek. [2] [1] https://academic.oup.com/aje/article/doi/10.1093/aje/kwaa093/5847586 https://academic.oup.com/aje/article/doi/10.1093/aje/kwaa093... [2] https://www.newsweek.com/key-defeating-covid-19-already-exists-we-need-start-using-it-opinion-1519535 https://www.newsweek.com/key-defeating-covid-19-already-exis...