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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Okay. Though the aerosol part is most important for the medical workers—they do the aerosol-generating procedures like intubation. That's still an N95. Also the other viruses studied (with bigger samples) are similar size. For regular people, I think it just strengthens advice.
So I guess I'd say instead of "caution" I'd say, this keeps the emphasis on N95 for medical folks.
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