In fact, there are three types of medical masks, one is a disposable medical mask, the other is a medical surgical mask, and the last is a medical protective mask. Three types of medical masks have requirements for microbiological indicators. The indicators include two situations: one is a non-sterile mask, which should meet the microbiological control standards, that is, a certain number of bacteria are allowed, but must be within the control range; the second is a sterile mask, which does not allow bacteria to exist. Both non-sterile medical masks and sterile medical masks have protective functions, which can prevent droplets and achieve the purpose of preventing cross-infection.
It is worth mentioning that the sterile and non-sterile medical masks on the market are actually legally sold. There is no problem with defective products, but it should be selected according to different application scenarios. We know that sterile masks must be used in medical environments to prevent patients from infecting bacteria. These medical environments mainly include ICUs, operating rooms and other places where strict control of the microbial environment is required. On the contrary, in our daily use, this kind of sterile mask is actually not needed. You only need to wear non-sterile masks to meet the requirements of safety protection, because their protection levels are made in a 100,000-level dust-free workshop, which can meet the safety of use.
From this perspective, in daily life, as long as masks are purchased through formal channels, they will actually have no effect on normal use. Don't always feel that the protective effect of non-sterile masks is not good.
In addition, I would like to remind my friends here that non-sterile masks refer to masks that have not been processed in the sterilization process. They may contain bacteria and other microorganisms, but they are not disease-causing. They can also be said to be ordinary dust masks. , It is not a sterilized medical mask. It does not have a good barrier effect on viruses and bacteria. It can only be used for ordinary haze, dust, wind and sand, etc. Therefore, non-sterile masks have no great effect on anti-virus. So everyone should not wear this type of mask in severely affected areas~ We still have to wear sterile medical masks~ I hope we still have to protect our health and safety in our daily work and life. The weather turns cold and the virus may come back. We All that needs to be done is to wear a mask well and take precautions.