Very few viruses are true aerosol transmitted (measles is), it’s likely COVID is droplet based so coarse masks will help. Even with an N95, true aerosols can ma

Very few viruses are true aerosol transmitted (measles is), it’s likely COVID is droplet based so coarse masks will help. Even with an N95, true aerosols can make it through, though obviously not 100% transmission (95 means block 95% of 0.3 micron particles, individual viruses are a factor of 2-3 smaller usually).