Since early 2020, as the COVID-19 pandemic raged both across the U.S. and the world, various photographs of masks worn during the 1918-1920 influenza pandemic were shared online, as we noted with ...
Wearing a mask is one way to reduce the spread of COVID-19. There are many types, including surgical masks, cloth masks, and respirators. SARS-CoV-2, the virus that causes COVID-19, usually transmits ...
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