A modified mask which covers only the nose has recently been used by medical workers at the frontlines of the novel coronavirus battle in Hubei province.
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The U.S. Needs China's Masks, as Acrimony Grows - The New York Times
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Opinion Here's Why the Science Is Clear That Masks Work - The New York Times
Opinion China's new covid nightmare may become a global catastrophe - The Washington Post
China CDC updates mask guidelines for seasonal respiratory illness - SHINE News
Many in China Wear Them, but Do Masks Block Coronavirus? - The New York Times
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