NPR News: A User's Guide To Masks: What's Best At Protecting Others (And Yourself)

A User's Guide To Masks: What's Best At Protecting Others (And Yourself)
They're made of cotton. Or polyester. Or paper. Or polypropylene. Here's what researchers say about the effectiveness of the different types of face mask during this pandemic.

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at July 2, 2020 at 05:10AM
Health & Science