Check out this article from @nytimes. Because I'm a subscriber, you can read it through this gift link without a subscription. The debate over masks’ effectiveness in fighting the spread of the coronavirus intensified recently when a respected scientific nonprofit said its review of studies assessing measures to impede the spread of viral illnesses found it was “uncertain whether wearing masks or N95/P2 respirators helps to slow the spread of respiratory viruses.”https://www.nytimes.com/2023/03/10/opinion/masks-work-cochrane-study.html