>>10253660 (pb)
yeah, that's just CO2, what about our own germs, bacteria, virus's and other adulterants exhaled and re-inhaled over and over again.
one needs to ask themselves a 'common sense' question: Does inhaling muh own respiration over and over again all day long affect muh health???
By the way, all the digs we've done show cloth masks are absolutely useless!