There are four types of medical masks, namely: medical surgical masks, medical protective masks, ordinary medical masks, and ordinary degreased gauze masks. The first three are medical devices and are included in the management of medical devices, and ordinary skim gauze masks are not managed as medical devices.

Medical surgical masks have the highest level of protection. Its outer non-woven fabric has the effect of preventing liquid splashing, the middle layer of meltblown cloth can block germs, and the inner layer of non-woven fabric can absorb moisture and moisture exhaled by the human body; medical protective masks Secondly, it requires the filtering effect of germs and particles to reach 95% or more, that is, it meets the N95 and above grade; the filtering effect of ordinary medical masks on germs and particles is lower than that of medical protective masks, which are suitable for general protection of medical staff.