Under normal circumstances, KN95 standard masks can be […]
Under normal circumstances, KN95 standard masks can be used for 3 days if there is no epidemic situation, but now the new type of pneumonia epidemic is more severe. The doctor’s recommendation is to replace it every 4 hours. If you go to a crowded place, it is appropriate 1-2 Replace every hour.
If the KN95 mask is contaminated, such as in a crowded place or in an epidemic area, if the KN95 mask is sneezing or coughing from the other side, it is contaminated and needs to be replaced in time.
For first-line doctors in hospitals, they basically use special medical and surgical masks, goggles and protective clothing for basic safety protection. Medical surgical masks are basically worn once and replaced when they are used next time.
Now you know how long the medical KN95 mask can be used, it can usually be used for 3 days, but under the current situation, it is recommended to replace it every 4 hours. It also depends on the surrounding environment. If you are walking in the community, don’t go far. KN95 masks can be worn multiple times in some places, just change one a day, but if you are going out to a crowded place, it is recommended to change it every 4-6 hours, just 2 masks a day.