There is no uncertainty. Masks are not something new that has only existed since 2019. They are used for various purposes, from diving to astronautics, in all kinds of industries and have been seriously researched and used for about a hundred years, and many of these purposes are far more demanding than protection from viral aerosols. Th…
There is no uncertainty. Masks are not something new that has only existed since 2019. They are used for various purposes, from diving to astronautics, in all kinds of industries and have been seriously researched and used for about a hundred years, and many of these purposes are far more demanding than protection from viral aerosols. There are approximately 20 levels of protection in total. Serious use must ensure (1) that the appropriate mask is used (2) that it is used correctly (3) that it is used consistently.
If someone claims that masks GENERALLY don't protect, and the only thing they've tested are FFP2 masks (so roughly level 4 masks out of 20 levels) and haven't even checked that the masks are being used properly and consistently, they're either insane or malicious.
I watched a movie from 2018 that took place in China and a plot point involved an American getting sick on a bus and the Chinese passengers gave her a mask and demanded she wear it.
There is no uncertainty. Masks are not something new that has only existed since 2019. They are used for various purposes, from diving to astronautics, in all kinds of industries and have been seriously researched and used for about a hundred years, and many of these purposes are far more demanding than protection from viral aerosols. There are approximately 20 levels of protection in total. Serious use must ensure (1) that the appropriate mask is used (2) that it is used correctly (3) that it is used consistently.
If someone claims that masks GENERALLY don't protect, and the only thing they've tested are FFP2 masks (so roughly level 4 masks out of 20 levels) and haven't even checked that the masks are being used properly and consistently, they're either insane or malicious.
I watched a movie from 2018 that took place in China and a plot point involved an American getting sick on a bus and the Chinese passengers gave her a mask and demanded she wear it.