Wearing medical surgical masks and N95 masks can be used to prevent novel coronavirus. Surgical masks are more airtight and are commonly used in healthcare facilities and for the prevention of novel coronavirus pneumonia, while N95 masks provide better protection than surgical masks and can be used by frontline doctors in neocoronavirus pneumonia wards or fever clinics, as well as by patients with a confirmed diagnosis of neocoronavirus. Both medical surgical masks and N95 masks are effective in filtering novel coronavirus for prevention. Medical surgical masks can be worn by people with moderate risk of exposure, such as healthcare workers working in general outpatient wards, practitioners engaged in outbreak-related work, staff working in crowded places, and people living at home in isolation and communal living. And contact with confirmed patients with new coronavirus pneumonia, must wear N95 masks, need more than two levels of protection and so on. During the new coronary epidemic, it is recommended to go out to wear a mask, and people to maintain a certain distance, the interval of one meter or more, to avoid going to public places, to pay attention to diligent hand washing, diligent disinfection. [Tip] This article refers to the “new coronary pneumonia, new coronary virus pneumonia”, etc., has been December 26, 2022, the National Health Commission issued a notice to change the name to “new coronary virus infection”.