Yes, the diameter of the virus is very small, but it has no cell wall itself and cannot exist alone when exposed to the air. In order for the virus to spread (survive) in the air, it must be parasitic in a cell (vector). Only bacteria and other microorganisms can provide parasitic conditions for viruses, and all airborne microorganisms are attached to droplets, body fluids, particles, aerosols, etc. in the air.
The ptfe industrial fresh air filter material produced has strong hydrophobicity, chemical resistance, waterproofness and low wind resistance, and can obtain high dust removal efficiency, for some extremely fine particles with a diameter of 0.1um-0.3um , the filtration level can reach H13-U16.
</p
