Thứ Năm, 2 tháng 7, 2020

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.

Đọc thêm tại NPR
at July 2, 2020 at 05:10AM
Health & Science

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