Oh, sure. If they were putting on a new mask when entering those rooms, and then discarding it and replacing it with a fresh one when they exited and dealt with everyone else, that would make perfect sense.

I’m just saying that the system of “let’s use literally the most minimal precautions only with the patients that are known to be potentially deadly, and with everyone else just walk around breathing potentially literally anything on literally everyone, like a big squad of Typhoid Marys in scrubs” is potentially in need of some constructive criticism and revision.