if this works, doesn't this imply a lot of the exhaled breath is unfiltered?https://twitter.com/MDiPaolaMD/status/1293311712507166720 …
i'm not saying it doesn't help, i'm saying that it's not as significant a protection as people think, it is still worth social distancing for example.
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The bigger problem is people not wearing the masks. In South Korea, at an indoor event 26 of 27 people contracted COVID. The secret? 1 was wearing a mask.
Thanks. Twitter will use this to make your timeline better. UndoUndo
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