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FWIW, a hepa filter is more effective than an N95, but probably harder to breathe through. And you'd have to shape it into a mask that wraps around your nose, because if air is leaking around the edges of the mask, it's much less useful. That's one reason a bandana is useful, because it can be adjusted to leak less.
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People who cough but are asymptomatic are surely who you’d like to see covering up with something. Logically, everyone should wear something.
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Masks & filters remind you to not touch your mouth and nose.
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rgG wrote:
Since we know that a basic cloth mask or scarf doesn’t do much to keep you from getting infected, do you think maybe we are being encouraged to wear masks to help keep asymptomatic people from spreading the C19 virus?
That’s exactly right. Specifically, experts have come to believe that the virus may spread through the dispersement of exhaled
aerosol particles by asymptomatic infected persons, whereas before it was believed the virus could only spread through droplet particles. Aerosol particles are much smaller than droplet particles and can disperse much farther from the body via sneezing, singing and even speaking normally.
Experts now believe wearing a mask
blocks may help to block the dispersement of droplet AND aerosol particles.
EDIT: Edited to increase accuracy.
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