A dry cough is not necessarily the result of a novel coronavirus infection. When a new coronavirus infection forms a new type of pneumonia, the main symptom is a dry cough, which can be accompanied by fever, malaise, chest tightness, shortness of breath, and dyspnea. There are many causes of dry cough, such as cough variant asthma, bronchial tuberculosis, bronchopulmonary cancer, and post-cold cough, all of which can cause dry cough to varying degrees. When this group of people has an epidemiological history and CT lung suggests the formation of viral lung, they should be treated as suspected patients and have their respiratory specimens tested for novel coronavirus nucleic acid at an early stage. If the test is positive, consider the presence of novel coronavirus infection and provide early isolation, observation and treatment.