Still Confused About Masks? Here’s the Science Behind How Face Masks Prevent Coronavirus
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The CDC now recommends Americans should wear cloth face coverings or masks, leaving medical-grade masks for healthcare workers on the front lines. | NBC Nightly News with Tom Llamas
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Homemade cloth face masks likely need a minimum of two layers, and preferably three, to prevent the dispersal of viral droplets from the nose and mouth, a video case study indicates. https://cnn.it/32Qes5K | CNN
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