There are individual differences in the number of patients with neocollins who cough and those who do not. With the increasing popularity of vaccination against Neocollins, some people infected with Neocollins become asymptomatic, testing positive for nucleic acids only, without coughing or other symptoms. In symptomatic patients, the cough varies in severity and is more pronounced when the disease is severe. In the early stages of the disease, most patients have a dry cough, generalized weakness, fever, chest tightness, and in a few cases, abdominal pain, diarrhea, and decreased or even loss of taste and smell. Mildly ill patients will be accompanied by mild cough symptoms, patients with underlying respiratory diseases are more likely to cough. Patients with progressive exacerbation of the disease after the new coronavirus infection will then develop the typical signs and symptoms of viral pneumonia. Accompanied by fever, cough symptoms, at the same time chest tightness, breath-holding obvious. CT examination of the lungs appeared obvious patchy shadows, grinding glass-like changes, localized solid changes in the lungs, affecting the function of pulmonary ventilation. Therefore, the presence or absence of cough symptoms can not be used to determine whether the new crown virus infection, the current main nucleic acid test combined with lung CT examination to confirm the diagnosis of whether the new crown infection.