We're far, far beyond the point where we have to question or wonder if wearing an air filter in an infectious disease ward will decrease your chances of catchin

We're far, far beyond the point where we have to question or wonder if wearing an air filter in an infectious disease ward will decrease your chances of catching the disease. Maybe you personally really don't know, but maybe you're being willfully ignorant, I don't know you. If you refused to wear the mask, the very serious and educated people at the door of the ebola ward would likely refuse you entry to the ebola ward, which is probably all for the better anyway.