My wife is a nurse in a hospital in one of the COVID epicenters, though she does not work with patients that have tested positive, and she is not getting adequa

My wife is a nurse in a hospital in one of the COVID epicenters, though she does not work with patients that have tested positive, and she is not getting adequate protection. The PPE policies she's subject to have already resulted in some of her colleagues being infected, but nothing has changed. She is not allowed to wear a mask for most of her patient interactions. I don't know what to do.