Guo Enyu, Xue Chunli, Chen Tao, Ye Jing and Wang Yan
With the spread of novel coronavirus pneumonia, human survival is facing severe challenges. The new coronavirus is the main cause of pneumonia. The novel coronavirus is a new strain of coronavirus that has never been found in human body before. The individuals of the new coronavirus are very small, much smaller than the bacteria, which need to be observed by electron microscope. The new coronavirus is simple in structure, only composed of protein shell and internal genetic material (RNA), without cell structure. It can't grow and replicate independently. It can only parasitize in the living cells of human respiratory tract and lung. It can replicate itself by using the cell system of the host based on the genetic information of its own RNA. The newly generated virus will continue to infect other cells. Mask is an important novel coronavirus to prevent respiratory infectious diseases, and can reduce the risk of new coronavirus infection. The mask can not only prevent patients from spraying droplets, reduce the amount and speed of droplets, but also block the droplets containing coronavirus, so as to prevent the wearer from inhaling and protecting the susceptible population.
KN95 Mask, New Coronavirus, Epidemic Prevention, Health, Physical Examination Activities