T. A. Gardner
Serial Thread Killer
You keep saying "effectiveness". You have not demonstrated it as of yet.
Clearly you can see in the video the masks slow down the spread.
The two studies I cited pages back, one from Yale and a Danish one, show that masks have no effect on the rate at which a masked versus unmasked population contract Chinese Disease. The video shows what the mask does in a lab setting. It is clear from the Yale and Danish study that the presence or absence of masks has little or no effect on the vectors by which COVID is contracted.
