According to the law of Prevention and Treatment of Infectious Diseases, based on the current knowledge of the etiology, epidemiology, clinical features and other characteristics of the novel coronavirus pneumonia, and approved by the State Council, the National Health Commission decided to classify the novel coronavirus pneumonia as a Class B infectious disease, but to apply to it the preventive and control measures for a Class A infectious disease. As novel coronavirus pneumonia is included into the management of statutory infectious diseases, governments at all levels, health administrative departments, other government departments, medical and health institutions can take a series of preventive and control measures such as isolation of patients for treatment, isolation of close contacts for medical observation in accordance with the law, and jointly prevent and control the spread of new coronavirus pneumonia epidemic.