The characteristics of the novel coronavirus include the following: 1. pathogenic characteristics: the genetic characteristics are significantly different from SARSr-GoV and MERSr-CoV, and the virus is more sensitive to ultraviolet light and heat; 2. epidemiological characteristics: the infectious source is the infected person of the novel coronavirus, which can be transmitted by respiratory droplets and contact, so the population is generally susceptible; 3. clinical characteristics: the incubation period is 1-14 days. Most patients have a good prognosis, and children have relatively mild symptoms. In addition, the symptoms of patients infected with novel coronavirus are not specific, so a comprehensive diagnosis combined with epidemiological history, laboratory tests and imaging examinations is needed.