Dry cough is the most common clinical symptom of respiratory diseases and can occur in many diseases, such as bronchitis, colds or the development of bronchial asthma, bronchiectasis, or after smoking, allergies to objects or smells, can manifest as a dry cough. Of course, some patients with novel coronavirus infection may also present with a dry cough. Therefore, it is difficult to determine whether a novel coronavirus infection is present by cough symptoms alone. If a possible novel coronavirus infection is considered, the prerequisite is whether the patient has been to an infected area and whether he or she has been in contact with a patient with a novel coronavirus infection. If there is a history of close contact, there may be conditions for the onset of the disease. In addition to the above conditions, clinical symptoms should be noted. In addition to the symptoms of cough, it is necessary to combine whether there is also fever, diarrhea, and respiratory distress symptoms. The most important basis is the pathogenetic examination. Viral nucleic acid testing and viral sequencing can determine if there is a novel coronavirus infection. Content source; Dr. Yurei