When this story was originally published, health officials in the United States were asking people to save masks for front-line healthcare workers amid a shortage in personal protective equipment.

They noted flaws in the data. For example, many health workers who got COVID in the trials were not infected while wearing their masks at work. But still, they concluded the masks were equivalent.

They noted flaws in the data. For example, many health workers who got Covid in the trials were not infected while wearing their masks at work. But still, they concluded the masks were equivalent.

Health care workers in Arizona report they are re-using, rationing and arguing over protective masks as they try to treat patients while avoiding illness themselves. And the situation won't get ...

They noted flaws in the data. For example, many health workers who got COVID in the trials were not infected while wearing their masks at work. But still, they concluded the masks were equivalent.

They noted flaws in the data. For example, many health workers who got covid in the trials were not infected while wearing their masks at work. But still, they concluded the masks were equivalent. “It ...

Nurses, researchers, and workplace safety officers worry new guidelines from the Centers for Disease Control and Prevention might reduce protection against the coronavirus and other airborne ...