Cough and no fever alone cannot diagnose novel coronavirus pneumonia because novel coronavirus pneumonia, like other infectious diseases of the lungs, can cause a patient to develop a cough, fever, chest tightness, and chest pain. However, some patients can present with atypical symptoms such as decreased diet, abdominal pain, nausea, and diarrhea. Chest imaging criteria, such as X-rays and CT scans, must be present to diagnose Pneumocystis carinii pneumonia. In addition, it is important to have secretion nucleic acids, such as sputum, pharyngeal secretions, nasal mucus. If bleeding is convenient, blood can also be tested for new coronavirus nucleic acids. Symptoms, imaging, and nucleic acid testing are all required for a positive diagnosis of a patient with C. neoformans pneumonia.