Just out @NatureMedicine, @bencowling88 and cols show that face masks can indeed reduce transmission of #coronavirus , at least from symptomatic individuals - https://go.nature.com/2UEDro7 #COVID19pic.twitter.com/0Xks5prhEo
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Caution for sample size equal to 17 people @zeynep . If you read my short thread, you'll see. The evidence *from this one study* is suggestive at best for aerosols and a little stronger for droplets (but non-coronavirus)...
We're with you on the masks, but can still question the veracity of the evidence from individual studies...
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