Dust masks are a kind of dust-proof appliances often used in life. Dust masks have a dust-proof role, with a special structure and special density, which can prevent PM2.5 and other tiny particles. The role of dust prevention, in fact, can also play the role of preventing droplets, aerosols, bacteria, viruses. Therefore, dust masks have a certain degree of protection against new coronaviruses. Content source: Dr. You Lai