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 ...
Early in the pandemic, mask-wearing policies were consistently associated with decreased transmission of SARS-CoV-2. At that time, the masks worn were generally made of cloth and often improvised. The ...
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