Cough is a common manifestation of the respiratory system, and the main manifestations of the new coronavirus pneumonia are fever, dry cough and dyspnea. If there is only a dry cough and no other symptoms such as fever and dyspnea, it is necessary to combine with other manifestations to make a comprehensive judgment, including checking whether there are any abnormalities in the blood counts, whether there are any decreases in the leukocytes and lymphocytes, and combining with X-rays, i.e., chest X-rays or CT films to determine whether there is any inflammation in the lungs and other comprehensive judgments. Because cough is a common manifestation of the respiratory system, cough alone cannot diagnose novel coronavirus pneumonia. Prolonged cough such as chronic bronchitis, asthma also manifested as cough, interstitial disease and many other respiratory diseases can be manifested as cough, if it is a very long time cough, there is no other manifestations, do not consider it is the new coronavirus pneumonia, because the new coronavirus pneumonia will have other manifestations, there is no other manifestations, simple cough can not determine the new coronavirus pneumonia. Source: Dr. Yurai