On Wed, 1 Jul 2020 09:40:18 -0700 (PDT), wrote:

Just to make a point about M95 masks. The pore size is 3 micrometers
in diameter and the size of a covid-19 virus is 1.2 nanometers. so
the size differential is 20 times.

Please check your math:

1.2 nanometers = 1.2*10^-9 meters
3 micrometers = 3*10^-6 meters
3*10^-6 / 1.2*10^-9 = 2.5*10^3 = 2,500 times as large.

"Fact check: No, N95 filters are not too large to stop
COVID-19 particles"
https://www.usatoday.com/story/news/factcheck/2020/06/11/fact-check-n-95-filters-not-too-large-stop-covid-19-particles/5343537002/
The COVID-19 particle is indeed around 0.1 microns in size,
but it is always bonded to something larger. "There is
never a naked virus floating in the air or released by people...

Secondly, the N95 mask itself uses electrostatic absorption,
meaning particles are drawn to the fiber and trapped,
instead of just passing through.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558