As always, reading the NYT is worthless. Perhaps start with this part of the actual linked article. > What are the limitations of the evidence? > Our confiden

As always, reading the NYT is worthless. Perhaps start with this part of the actual linked article. > What are the limitations of the evidence? > Our confidence in these results is generally low to moderate for the subjective outcomes related to respiratory illness, but moderate for the more precisely defined laboratory‐confirmed respiratory virus infection, related to masks and N95/P2 respirators. The results might change when further evidence becomes available. Relatively low numbers of people followed the guidance about wearing masks or about hand hygiene, which may have affected the results of the studies. https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD006207.pub6/full https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD...