Seems common sense had to be proved. I knew from the very beginning breathing in ones own respiration all day long was horrible for the body.
And a little digging showed the pores in cloth masks were a thousand times larger than the, so called, 'muh corona' virus.
A little moar digging and I learned that virus's are dead, so how can one be infected? Learning that it's not a virus at all causing CV-19 disease.
When a system is based on lies, the residual effects of that system will result in destruction as we're seeing now.