Novel coronavirus pneumonia causes infection mainly through respiratory droplet and contact transmission, so to prevent transmission of viral pneumonia mainly from these two ways. The most effective way to prevent droplet transmission is to wear a mask, which should be worn above the level of a medical surgical mask, so that you can effectively avoid inhaling droplets, aerosols and other particles containing viruses. At the same time, in the process of communicating with people in public places should try to maintain a distance of more than 1m, which can avoid splashing droplets from each other to themselves. You should wash your hands promptly after touching public objects outside, and avoid touching your eyes, nose and mouth with your hands to avoid contact transmission.