Well this is interesting: “Farce Mask”:
“Health authorities have warned that surgical masks may not be an effective protection against the virus.
“Those masks are only effective so long as they are dry,” said Professor Yvonne Cossart of the Department of Infectious Diseases at the University of Sydney.
“As soon as they become saturated with the moisture in your breath they stop doing their job and pass on the droplets.”
Professor Cossart said that could take as little as 15 or 20 minutes, after which the mask would need to be changed.”
Now, making snake oil claims about masks has become big business. And mask-wearing has become a fundamentalist religion.
