
Bill Mitchell @mitchellvii
I am talking about N95 masks. Their porosity is .3 microns while COVID is 0.125 microns. — PolitiTweet.org
Josh @JoshWeber2
@mitchellvii OK, I was concerned you were talking about the N95 masks that doctors wear. And again, I mention it ou… https://t.co/l2UeUO2Fkk