On Masks-WHO says no evidence they work against #covid19. Why would they?Best mask pore sizes are 35-180 um (microns). Viruses range from 0.02 - 0.4 um or, 87 to 9,000x smaller than mask pores minimum (an avg of virus being 4,000 times smaller than mask pores). A mask has effect of floating on water in a chicken wire boat.
