I'm seeing a lot more people using masks. That's good. Unfortunately, I'm also seeing a lot that are using masks that only protect the wearer but not those who may come in contact with someone infected who is wearing one.
Notice the valve on this mask. It allows unfiltered breath and coughs to be expelled by the wearer.
It's a slow and painful process, especially when the powers that be spun the line that masks really don't do anything for you because you don't know how to put it on and it will do nothing to protect you from covid 19. Oh, and there are nowhere near enough for docs and nurses.
Millions of N95 masks have been available in US, UK,and Canada during this epidemic. Millions of those masks are being purchased by foreign buyers, while we desperately need them here.
https://www.forbes.com/sites/daviddisalvo/2020/03/30/i-spent-a-day-in-th...
[This essay is adapted and expanded from a comment I made in another essay.]
One of my businesses is an online vacuum cleaner supplies store. I just tested HEPA vacuum cleaner bag material for breathability when used as material in a do-it-yourself face mask. It turns out that HEPA is extremely difficult to breathe through when attached to the face with a good seal. It will not make a good DIY mask.
