the flaw in this approach is that it is not intended for the mask to protect against airborne virii, but to protect against transmission through spittle and mucus from sneezing and coughing. that being said, in may of 2020, right in the thick of covid, the cdc released a study on the effectiveness of masks in preventing the spread of respiratory illness other than covid. it found that paper masks are good for about 10 minutes after which they get saturated and their effectiveness plummets. they found cloth masks almost entirely useless in preventing transmission. the only masks that were found to make a significant different were the n95 masks. and that was just great since at the time the study came out, n95s were being sold at inflated prices because kikes and other vultures snapped them up to make a quick buck.
United States