According to the current criteria of the “Pneumonia Treatment Protocol for Novel Coronavirus Infection (Trial Version 4)”: with a return to normal temperature for more than 3 days, significant improvement in respiratory symptoms, and two consecutive negative nucleic acid tests for respiratory pathogens (at least 1 day between sampling times), the patient can be released from isolation and discharged from the hospital or transferred to the appropriate department for treatment of other diseases according to the condition. The novel coronavirus requires isolation of close contacts with confirmed or suspected patients because of the following characteristics 1. The disease is generally susceptible to the population, especially the elderly and those with underlying diseases, who are more seriously ill after infection; 2. The incubation period of novel coronavirus pneumonia is about 7 days on average, with a short period of about 1 day and a maximum of 14 days, and the incubation period is asymptomatic but infectious. Therefore, isolation is required to control the development of the epidemic.