The truth about masks is that they are helpful in preventing spreading disease, but don't get a false sense of security. I copied this from Glenn Beck. I believe this is the truth.
If you have a triple-ply mask, the pore size will end up being effectively five microns. And five microns, to a COVID-19 virus particle, is 50 times larger. That’s approximately the same differential between the two-inch separation between the wires of a chain-link fence, and a gnat,” Jensen explained.
“But now what we’re seeing is if we have some collision of COVID-19 viral particles with the latticework of any mask … if you’re breathing out or breathing in and the viral particles collide with the actual latticework of a mask, I think intuitively, yes, we can reduce the amount of virus particles that are going back and forth.”
Dr. Rutherford said masks are essential tools for fighting COVID-19, as long as you wear them correctly. He laid out the three main reasons he believes we should all be wearing masks.
“So, we’re trying to do three things,” he said. “First of all, we’re trying to protect the people around you, in case you are one of the 60% of people who have asymptomatic infection and don’t know it. The second thing we’re trying to do is to protect you. The third thing we’re trying to do is, if you get infected, you’ll get infected at a lower dose, and then you’re less likely to develop symptoms. That’s the threefer.”