N95 masks filter 95% of 3 micron particles
viruses are about 100 nanometers
there are 1000 nanometers in 1 micron
30 viruses abreast can go through 300 microns
It's like trying to stop mosquitos with a chain link fence
edit
"30 viruses abreast can go through 300 microns"
to be
"30 viruses abreast can go through 3 microns"