How long a medical mask could be worn?
How long a medical mask could be worn? It is generally recommended that ASTM-certified medical surgical masks be used continuously for no more than 4 hours, because the protective effect will decrease with time.
In addition, when medical masks become damp, soiled, or damaged or fall off, the protective effect will also be affected, and new masks should be replaced.
After use, medical masks should be discarded in a trash can with a lid to reduce the chance of spread of germs. Disposable masks should not be reused. After cleaning and disinfection with water, heating, alcohol and other chemicals, ultraviolet rays, etc., the waterproof layer and filter layer of the mask are likely to be damaged. How much protective effect there is after disinfection has not been done Testing is generally not recommended.
However, in the case of shortage of materials, the method of choosing dry heating or ultraviolet disinfection masks is relatively more reliable.
In addition to wearing a mask, wash your hands frequently!
As I said before, wearing a mask alone is not effective in preventing viral infections, because the virus is not only spread by droplets, but also through direct or indirect contact with mucous membranes such as the mouth, nasal cavity, and eyes. In addition, people infected with the new coronavirus are The incubation period can also spread the virus. When you come into contact with carriers, or when you come into contact with items contaminated by the virus, you may be infected.
If personal hygiene is not good, touch the outside of a mask that blocks many germs to remove the mask, and then rub your eyes and grab food without washing your hands, it is tantamount to introducing germs to yourself again, and the protection of the mask is in vain Up.
Therefore, it is very important to develop a good habit of not touching your eyes, nose and mouth directly with your hands, and washing your hands frequently and carefully!