Why the Science Is Clear That Masks Work

Now [...] Cochrane [...] says the way it summarized the review [as previously posted on HN] was unclear and imprecise, and that the way some people interpreted it was wrong.

“Many commentators have claimed that a recently updated Cochrane Review shows that ‘masks don’t work’, which is an inaccurate and misleading interpretation,” Karla Soares-Weiser, the editor in chief of The Cochrane Library, said in a statement.

So the evidence is relatively straightforward: Consistently wearing a mask, preferably a high-quality, well-fitting one, provides protection against the coronavirus.