Up front: I am not a virologist; I am not saying these things are true, I am saying this is my understanding of this discussion. I am also not saying that Sars-

Up front: I am not a virologist; I am not saying these things are true, I am saying this is my understanding of this discussion. I am also not saying that Sars-Cov-2 can spread by small dry particles. I think there a 3 distinct things going on, at least. Large Wet Particles (droplets): easily caught by masks, fall quickly (3-6 feet), make surfaces infectious, cause infection by touch. Small Wet Particles (aerosol type 1): Hang in the air for at least 30 minutes. Infectious if breathed in. Mask is less effective (but not ineffective) Small Dry Particles (aerosol type 2): Hang in the air for 12 hours. Infectious if breathed in. Infectious by touch. Mask is less effective (but not ineffective). Most viruses are not viable as dry particles.