They don't want you to know this.

[oldcolner]

Besides Norder showing the warning on the box that they don't protect against Covid, there were billboards in London showing adverts that claimed they did, the ASA instructed them to be taken down as they were misleading. But despite all the medical and scientific experts saying they are a waste of time, and indeed if not worn properly, which they can't be in 99.9% of cases, can actually help spread the virus, people still want to wear them.

Ah well, god alone knows why.

Sinkov
That’s Some claim “All medical and scientific experts.”

Here’s one from China who says otherwise

Q What mistakes are other countries making?

A: The big mistake in the U.S. and Europe, in my opinion, is that people aren’t wearing masks. This virus is transmitted by droplets and close contact. Droplets play a very important role—you’ve got to wear a mask, because when you speak, there are always droplets coming out of your mouth. Many people have asymptomatic or presymptomatic infections. If they are wearing face masks, it can prevent droplets that carry the virus from escaping and infecting others.

https://www.sciencemag.org/news/2020...scientist-says

Given their control of the virus and of SARS and similar practices in many Asian countries before COVID it I think they know more about it than people in US and Europe who have no experience and done no studies.