MASKS: Guidance on upgrading and wearing

The National Institute for Occupational Health & Safety has a list of approved N95 respirators, which can be found at some home improvement stores, retailers and drugstores. These masks should have a cup, flat fold or duck bill shape; two straps that go around your head; an adjustable wire nose bridge; and appropriate markings indicating NIOSH approval, the CDC says.

The agency also has resources for determining whether an N95 respirator is counterfeit, and for properly putting it on, taking it off and performing a respirator seal check. ...