Wearing medical surgical masks and N95 masks can effectively prevent the infection of new coronavirus pneumonia. Medical surgical masks and N95 masks both contain a three-layer structure that can filter new coronaviruses and play a role in preventing new coronavirus infections. Generally speaking, ordinary preventive medical surgical masks can be, must be worn when going out, while maintaining a certain distance from people, preferably more than one meter apart, reduce the number of crowded public places, especially in elevators and other small, confined spaces do not touch, pay attention to diligent hand washing and disinfection. If you are in contact with confirmed or suspected patients with novel coronavirus pneumonia, or if you go to a fever clinic, you must wear an N95 mask, and pay attention to secondary or higher protection, such as wearing goggles, protective clothing, and shoe covers. New coronavirus pneumonia is very contagious, so in addition to wearing a mask, it is important to exercise to improve your body’s resistance and to get the new coronavirus vaccine to prevent infection.