The Masks Must Be Removed
The children must be protected from wearing masks ALL day at school, any medical personal know to replace their mask after 20 or so minutes, they put on a new mask to prevent the contaminated mask from becoming a bio-hazard. Generally, they need to be replaced after 6-8 hours. Moreover, the two sides of the mask can not be used interchangeably, because the outer layer of the mask often accumulates a lot of dust, bacteria and other dirt in the outside air, while the inner layer blocks the exhaled bacteria and saliva. If the two sides are used alternately, it will Some dirt and other substances on the outer layer are directly attached to the nose and mouth, which will enter the human body through the respiratory tract and affect the health of the human body, In addition, remind everyone to pay attention to the use of disposable face mask must be used within the validity period, expired should not be used, it can only be used once, must be destroyed after use. In f...