Since December 20, 2019, masks have become a “scarce commodity” for the Chinese people. In the fight against the epidemic, many people are asking: can’t buy masks, can masks be reused? In principle, medical masks and protective masks cannot be reused. But now masks are generally scarce, for ordinary people, if you do not have fever, runny nose, sneezing, sore throat and other symptoms appear, you can reuse protective masks. But there are a few precautions: 1, first of all, to confirm that after going out, there is no contact with high-risk groups, if you confirm that the other person is infected with the virus, the mask is determined not to reuse. 2, reuse masks try not to wear in dense crowded places, applicable to the occasional downstairs shopping, go out for a short time. 3, to reuse the protective mask, take off and put in a dry place to save. And then put in a hurry to seal the bag to save 4, theoretically speaking, the mask can not be reused more than 5 times. But You Dao Jun remind you, reuse risk, it is recommended to repeat at most once. So, how to reuse the mask sterilization? See online people say use sterilizer disinfection, or boiling water hot disinfection method, really can? Masks that need to be utilized twice should not only be considered for sterilization, but also pay attention to the fact that sterilization affects the protective ability of the mask as little as possible. Current masks are mostly made of polypropylene, which is not resistant to high temperatures, and high temperatures over 80 degrees will destroy the structure of the mask. It is recommended that the use of 75% of medical alcohol spray masks on both sides can be completed mask disinfection, can also be placed directly on the mask in the sun, the use of ultraviolet light disinfection. In fact, if there is a real shortage of masks, it is recommended to reduce the number of times you go out. Go out less, wash your hands more often, and everyone together to protect themselves, love and care always spread faster than the virus.