1. Wear it for an appropriate time
Medical protective masks can be used continuously for 6-8 hours, and should be replaced in time when the following conditions are encountered: the respiratory impedance is significantly increased (when breathing is difficult); the mask is damaged or destroyed; the mask cannot be closely attached to the face (when it fails the tightness test); Contaminated (such as when stained with foreign objects such as blood stains or droplets); once used in isolation wards or in contact with patients (because the mask has been contaminated); if the mask contains activated carbon, there is a peculiar smell in the mask.
Wearing medical masks should be tested for facial tightness. The simple test method is: After putting on a medical mask, exhale forcefully, the air cannot leak from the edge of the mask.
All kinds of masks, including N95 masks, can only isolate the virus on the surface of the mask. If you squeeze the mask with your hands and make the virus soak through the mask with droplets, there is still a chance of infection.
Do not throw away discarded medical masks at will, otherwise it will cause secondary pollution. Medical masks used in the general environment should be put into the medical trash can. The protection efficiency and wearing time of medical masks are issues of concern to everyone. When choosing a medical mask, it is important to pay attention to its filtration efficiency, but it is also important to choose one with good sealing performance, which can fit well with the human face, and to choose the one with unobstructed breathing.