In 1895, German pathologists proved that the wound infection of patients was related to air infection. He believed that people's saliva would carry bacteria and cause wound infection when talking. After his suggestion, doctors and nurses at that time wore a gauze-sewn mask to cover the mouth and nose, which could reduce the infection channel of the wound during the operation.
Since then, it has become a common practice for medical staff, food hygiene production and sales personnel and canteen cooks to wear masks, especially for food production and sales personnel.
Surgical staff should wear medical masks to protect patients from infection of surgical wounds. Medical surgical masks are suitable for basic protection of medical staff or related personnel, and for preventing the spread of blood, body fluids and splashes during invasive operation.
Sanitation workers and workers in dusty workplaces also need to wear dust masks, which are listed as labor insurance supplies and distributed free of charge to the relevant personnel. In the general population, especially in the epidemic season, many people wear haze masks, which has played a positive role in preventing the spread of diseases.
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