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1. www.webmd.com › covid › coronavirus-face-masksFace Mask for Coronavirus: Types, Best Filters, How to Make ...

   www.webmd.com › covid › coronavirus-face-masks

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   2024年5月16日 · What Are Face Masks? Face masks prevent disease droplets you cough, sneeze, or breathe from infecting others. They also help keep people who have COVID-19 or other illnesses from infecting you. As...