Interesting. I knew my Asian counterparts were onto something about wearing masks for all these many years.
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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Notice that this paper was in a clinical setting which is generally considered 'high-risk'.
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this paper is also good. in think the bifabric masks are promising however.https://academic.oup.com/annweh/article/54/7/789/202744 …
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