KN95 masks have a very large role to play in the prevention of new coronavirus infections, KN95 masks are respiratory protective equipment after our national standard 2626-2006, is a self-absorbing filtered anti-particle absorber standard certification of masks. For non-oil particles, the general experiment with sodium chloride small particulate matter protection efficiency is not less than 95%, more than 95% of the particles can be blocked outside the mask. Among them, KN95 masks have a medical mark part of the mask is mostly used for medical personnel to carry out the protection of the front line during the anti-epidemic, no medical mark masks are generally not recommended for medical personnel to use, ordinary people usually use no problem at all, with it to block droplets, aerosols no problem at all. Content source: Dr. You Lai