In accordance with the standards and important technical indicators required by various medical masks, medical protective masks are suitable for the protection of airborne respiratory infectious diseases by medical staff and related staff; medical surgical masks are suitable for medical staff or related personnel Basic protection, as well as protection against blood, body fluids and splashes during invasive procedures; ordinary medical masks have inadequate protection against pathogenic microorganisms and can be used for disposable sanitary care in ordinary environments, or cause disease Barrier or protection of particles other than sexual microorganisms such as pollen.