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CDC director explains new guidelines for wearing masks and benefits of doubling up

New research from the Centers for Disease Control and Prevention shows a well-fitting mask can offer significant protection against COVID-19, and there are new guidelines on the potential benefits of wearing two masks. CDC Director Dr. Rochelle Walensky said, "The bottom line is this: Masks work, and they work best when they have a good fit and are worn correctly." Watch her remarks.
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