Masks, even N95 masks, stop particles down to a certain size. They filter out molecules larger than that size.
The Covid virus is smaller than that size. It’s about 90 nanometers wide.
This doesn’t mean the mask doesn’t work. Covid viruses don’t float in the air alone. They are generally always riding on an aerosol particle of moisture and it is 1 micron or larger in size. The masks stop that.
So whatever test you’re thinking about . . . do the test correctly.
So whatever test you’re thinking about . . . do the test correctly.
No, not really
Why Masks Don't Work - "Careful Consideration Of Our Common Concerns" - Dr. Ted Noel
https://www.youtube.com/watch?v=3MKzKAzKCNk
So, aerosol contaminated with c-19 sit in your rag/mask etc while you, with added effort, suck air through the fabric, and exhale moisture into the fabric....
Sounds like what a home inspector tells you when you have have mold and mildew growing in your improperly ventilated and vapor barriers crawl space....
Continual respiration of fouled air.
Otoh, what happens when that big ol aerosol particle
Is inhaled into your primary sinuses and is stuck on a mucus membrane?
Your immune system slathers it will mucus and WBCs go to work, or not....