The advantages and disadvantages of wearing a mask for a long time as following:
Advantages: masks can prevent dust and sand from entering the mouth, and wearing masks can also prevent the flow of pathogens. In hospitals, doctors and nurses in wards with almost infectious potential are wearing masks. In cold weather, masks can be worn to prevent nose from freezing
The disadvantages: if the air quality is good, the mask will affect the inhalation of fresh air. Wearing a mask for a long time also has a certain impact on breathing. Oxygen after the mask filtration, it is inevitable to get infected with the bacteria of the mask itself, that is, the harmful bacteria that have been filtered before. The mask is only suitable for temporary avoidance of dust and epidemic bacteria, not suitable for long-term wear.
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