The other means of airborne transfer is in an aerosol. The viral particle must remain moist to survive so the only means of airborne travel is either an aerosol or larger respiratory droplets. N95 respirators can filter out aerosols however, they are not needed except in medical situations where there are constant high levels of the virus. Most of the viral particles are transferred on large respiratory droplets thousands of times larger than an aerosol droplet. These large droplets are easily stopped by a good two ply cloth masks. Although the aerosol droplets carry very little of the viral particles, they are the subject of a lot of research because they can travel great distances and can travel through ventilation systems.CDC says masks trap ordinary moisture exhalation but virus is transmitted by other means of distribution that mask can’t get.
My filter traps small rocks but not the sand surrounding it, same thing here.
Last edited: