The new claims that masks are not effective come under scrutiny

The new scientific review on masks and Covid isn’t what you think A meta-analysis seeks to be the last word on the effectiveness of masks, but finding answers in science isn’t that easy. Kelsey Piper Vox

Do the masks that so many of us spent more than two years wearing actually prevent the spread of Covid-19? There have been dozens of studies trying to answer that question, and often they point in different directions, or are too small to find the effect they’re looking for.

With something as complex as masks and respiratory disease, the right tool for the job isn’t one study but many: a meta-analysis of a number of different smaller studies to determine what effect is detectable in aggregate across the body of research.

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