Quote:
Originally Posted by Malsua
Sure there are. The degree of effectiveness of a blue paper mask, loosely worn, often with nose out, is so close to zero effectiveness as to not matter.
MIT came out with a study in the spring that said that even with N95, exhaust gases tended to go up and fall across rooms, and in fact, probably make it a bit worse rather than just coming out and dropping down in front of the infected person.
If you want to do something, how about an open window, door and venting mandate? How about schools hold class outside as possible? Turn off ACs and open every window and door possible(safety in mind of course).
It's all about diluting stagnant air full of virons because little paper masks on the faces of children isn't accomplishing anything and may in fact be harming them.
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The virus is transmitted via moisture droplets. Moisture droplets that manage to escape through those masks, don't travel as far as moisture droplets that are expelled with no mask at all.
If you want, you can experiment. Have someone fully infected with strep throat, sick as a dog, full of phlegm and puss, sneeze on you first without a mask.
After you recover from your own case of strep, have someone else with the same severity of strep throat sneeze on you but this time, while wearing a 3-ply paper mask.
You will probably be just fine.
Oh also that top blue layer isn't just paper. It's a fluid-resistant layer. Not fully waterproof, but moisture resistant. Breath can pass through it. Sneeze-snot cannot.