Well, let's see - if I was a doctor and even though a mask might not help with the spread of infection, but it would prevent a splash of body fluids from entering my nose or mouth, think I would still go with it.....Same reason the dentist wears them, when working in your mouth.....
Sorry, any sarcasm was not meant literally - - - - just have family in the health profession - I wouldn't want to give them a kiss, knowing that they could have some kind of backsplash in there - - -
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My comments are absolutely no reflection of, nor influenced by, my employer - take them at your own risk.