I’m baffled by science stuff and things Can one kindly erudite soul please explain the science stuff and things about how homemade COVID-19 masks work, why homemade masks save lives, and what is the most efficient mask material to keeo me safe?

I ask because every day I read posts that say “What an idiot! Wear your mask! I’ve never seen anyone so stupid!”

Please keep me from being stupid. Educate me, teach me science stuff and things. And, please, no links. We all know about fake news on the interweb. I need the science stuff and things to come directly from you.

Of course, if masks are actually worthless to my health and safety, please explain the science stuff and things about this, too.