Sep 30, 2022
Early mask guidance for COVID was confusing (BMJ, 2020) and undermined later messaging. Is it necessary for droplet spread? Do non-healthcare workers need a mask? Does a cloth mask work?
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Early mask guidance for COVID was confusing (BMJ, 2020) and undermined later messaging. Is it necessary for droplet spread? Do non-healthcare workers need a mask? Does a cloth mask work?