Because medical masks generally need to be sterile, ethylene oxide sterilization is required in order to achieve sterility standards. This is a disinfectant that can kill microorganisms in hospitals. But after disinfection, it needs to stand for 14 days, otherwise the ethylene oxide component will not release up to the standard, which is harmful to the human body. Therefore, the country of manufacture will also be strictly controlled. Then ordinary non-medical protective masks are not needed, only irradiation disinfection is required.
