New York City has joined Los Angeles in recommending that all residents wear masks or otherwise cover their faces while in public. This comes as the Centers for Disease Control and Prevention is expected to reverse its long-standing advice that members of the general public should not wear nonmedical masks when leaving the home. Meanwhile, the Food and Drug Administration has lifted a ban on imports of Chinese-made KN95 respirator masks amid a severe shortage of medical-grade N95 masks.
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