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Apr 24, 2020 · Surgical masks, the other key type of medical mask, were originally intended to prevent doctors from expelling potentially infectious particles onto patients as they operate on them, Sly says. How to Choose and Wear a Mask - Consumer ReportsApr 24, 2020 · Surgical masks, the other key type of medical mask, were originally intended to prevent doctors from expelling potentially infectious particles onto patients as they operate on them, Sly says.

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