The clinical features of novel coronavirus pneumonia may vary depending on the clinical phenotype. Some patients have a mild form of the disease, which is characterized by a cough or a low-grade fever, and some patients even have no fever and only a mild cough. If the nucleic acid test for the virus is positive, it can also prove that the patient is infected with the novel coronavirus. Therefore, to determine whether a patient is infected with novel coronavirus, it is not only necessary to look at the clinical symptoms, but also more importantly, to look at the pathogenetic examination. Epidemiologic experience is important to determine whether there is a chance of infection with novel coronavirus. After a patient has been infected with the virus, coughing symptoms can be mild or severe. Some patients are particularly mild, but it can not be denied that the virus is infected, some patients have a more serious cough, for example, patients with asthma, the cough than will be more serious, but it can not be based solely on the cough symptoms to determine that it is a new coronavirus infection. Therefore, clinical symptoms are only the basis for judgment, and more importantly, based on the pathogenetic examination. Source: Dr. Yurai