dodger02 said:
P.U.T.U said:
There is math and science behind the reason cloth does not work to filter out a small virus cell.
The math and science is that surgical masks and the like aren't designed to "filter out a small virus cell" that is approximately 100 nm in diameter (a cell that in and of itself won't make anyone sick). They're designed to filter droplets several times that size which contain hundreds of virus cells.
The "masks don't work" crew is letting perfection be the enemy of good.
There's no quantifiable data that masks work. The only support is initial hypothesis from observation. "Two hairdressers had covid, exposed 135 people and nobody got covid because they were all wearing masks." That's a hypothesis because there are many variables that affect transmission of a respiratory virus.
Science conducts controlled studies to find out what works, eliminating as many variables a possible.
When that is done in randomized controlled trials for mask efficacy, all the results are the same: statistically insignificant.
Yep typically the authors willingly inject their bias into the conclusions and restate the hypothesis as to why masks work. That's garbage and not science. It's politics. And it's why intelligent free thinkers are rejecting mainstream "science."
When I unknowingly had covid and exposed 7 people to it, including my 70 year old mom, nobody got it. None were masked. Guess my beard is as good as a mask. Science!