When the nurses and doctors doing surgery in hospitals stop wearing one “because they are useless”, I will believe they don’t work but not until then.
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Doctors and nurses wear masks, gloves, gowns, etc NOT to keep themselves protected from the patient, but to protect the patient from any germs the medical staff may have. In other words, the medical staff’s own breath harbors lots of germs and bacteria.
Petey
Yes, I mentioned that. I’m taking the chance that it works both ways.