Share This Content:How #respirators actually work and which type is best?
I see many claims #masks don't work. This thread will explain *how* they block #viruses much smaller than the size of the holes in the #filter and why you can still smell nasty things while wearing effective masks. 🧵1/ pic.twitter.com/6rSNZAofuY
— Jeff Gilchrist (@jeffgilchrist) December 14, 2022
