To confirm the diagnosis of novel coronavirus pneumonia, the predominant evidence at this time is still a positive nucleic acid test for novel coronavirus, so a patient with novel coronavirus pneumonia must have a positive nucleic acid test. If epidemiologic history features or a clear history of exposure exist and the novel coronavirus nucleic acid test is negative, the novel coronavirus nucleic acid test must be repeated 24 hours later. If the novel coronavirus nucleic acid test yields more than two consecutive negative results, it can be determined that the patient is currently free of coronavirus. However, it should be noted that the incubation period of novel coronavirus pneumonia is relatively long, averaging over 14 days. If the patient has a clear epidemiological history, medical isolation must be observed for more than 14 days, multiple re-tests for novel coronavirus nucleic acid, and a combination of the patient’s chest CT.