From the perspective of front-line doctors, medical personnel are in daily contact with high-risk or confirmed patients, the diagnosis and treatment environment is small, and the indoor virus content is relatively high. Both of the above virus transmission methods can be exposed. Your hands may touch the mucous membranes such as the nose, nose, and eyes, the patient's droplets enter the eyes, or even in an environment with a high virus content. In addition, front-line medical workers are overloaded with work for a long period of time, and lack of rest will cause a certain degree of resistance reduction. Therefore, they must wear masks, goggles, and even protective clothing.