Some patients may have no symptoms or precursors, and some may present early with symptoms such as nasal congestion, sore throat, fever, dry cough, and fatigue. Neococcal pneumonia is a pneumonia caused by a new coronavirus that infects the human body. Based on current epidemiologic investigations and studies, the incubation period of C.N.C.P. ranges from 1 to 14 days, with most cases lasting 3 to 7 days. Confirmed cases of C. neoformans pneumonia may present with significant fever, dry cough, malaise, cough, sore throat, decreased sense of smell (taste), diarrhea, respiratory symptoms, and imaging changes in the lungs. However, for asymptomatic infections, the absence of self-perceived or clinically recognizable signs and symptoms such as fever, dry cough, malaise, cough, respiratory symptoms, sore throat, decreased sense of smell (taste), diarrhea, etc., a diagnosis in combination with the results of nucleic acid testing is also required. In order to ensure the accuracy of screening cases or asymptomatic persons, it is also necessary to combine the positive nucleic acid test of neocoronavirus, the imaging characteristics of neocoronavirus pneumonia, and other methods to make a comprehensive diagnosis.