When going to crowd gathering places, there is a risk of infection because of the large number of people. Therefore, people should do the following protection: 1, minimize the close contact with others; 2, standardize the wearing of disposable medical masks, medical surgical masks or N95 masks, once the mask deformation, wet or dirty, need to be replaced in a timely manner; 3, pay attention to maintain hand hygiene. Always wash your hands with hand sanitizer or soap running water, you can also use disinfectant free hand sanitizer. In addition, once there are suspicious symptoms, such as fever, cough, sore throat, chest tightness, etc., should promptly seek medical attention.