There is a special gas mask for gas protection.

Medical protective mask refers to the self-priming filtering and dust-proof medical protective articles that can filter particles in the air, prevent the spread of some respiratory infectious microorganisms and block droplets, blood, body fluids and secretions.

The medical protective mask with standard code GB 19083 20 10 can meet the requirements of epidemic prevention.

The medical protective mask is made of one or more fabrics that can isolate virus aerosol, virus-containing liquid, etc. It still has blocking effect on virus aerosol and virus-containing liquid. Under the breathing airflow, when the mask is taken off, the outer surface of the mask is not in contact with the human body, which can filter particles in the air and block droplets, blood, body fluids, secretions and the like. The use of medical masks includes air tightness test, training, selection, medical treatment and maintenance.