When did that change? Seems like the expert scientists we were ordered to listen to always said anti-covid masks were to protect others from the infected droplets flying out of YOUR nose or YOUR mouth. I think that's why they wear them in surgery...right? Not to protect the nurses & doctors from inhaling the surgical patients blood, etc.

Towman....your examples are to protect you from inhalation of objects you see or know are in the air. I'm guessing you wear safety glasses when grinding steel? Do you wear the safety glasses when walking into a welding supply store?