Civilian masks are generally unable to protect against the new coronavirus. Generally speaking, civilian masks mostly refer to ordinary masks. Ordinary masks in general are not able to protect against the new virus, and there is no guarantee on the filtration effect, and they do not have the effect of blocking contaminants such as blood and body fluids. For lower risk places ordinary masks are not applicable, such as the public who stay in crowded places, the indoor working environment where people are relatively gathered, the public who go to the medical institutions, the children of child care institutions and school students who concentrate on learning and activities. Generally speaking for people above higher risk. First of all, it is recommended to use medical protective masks and particulate protective masks that meet the standards of GB2626 and GB19083. For medical workers engaged in fever clinics in infected areas, isolation ward health care workers, medical workers engaged in high-risk behaviors such as intubation and other high-risk behaviors are recommended to use GB19083 standard medical protective masks. Therefore, it is best for people wearing civilian masks not to go to higher-risk areas to avoid increasing the risk of infection.