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Oh, masks work? Oh, you're just making shit up.

submitted by SparklingWiggle to whatever 3.7 yearsSep 26, 2021 22:37:28 ago (+0/-0)     (www.pnas.org)

https://www.pnas.org/content/118/4/e2014564118

Overall, direct evidence of the efficacy of mask use is supportive, but inconclusive. Since there are no RCTs, only one observational trial, and unclear evidence from other respiratory illnesses, we will need to look at a wider body of evidence


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