The clinical symptoms of patients with confirmed diagnosis of new crown pneumonia mainly include fever, dry cough, fatigue, sore throat, etc., and there are certain differences between different patients. For patients with confirmed diagnosis of C.pneumonia, the clinical manifestations of patients are generally characterized by fever, dry cough and fatigue. Some patients may have nasal congestion, runny nose, sore throat, decreased or loss of smell and taste, conjunctivitis, myalgia and diarrhea. 1. Mild patients: low-grade fever, mild fatigue, smell and taste impairment, etc., without pneumonia. Clinical symptoms are mild, and no pneumonia is seen on imaging. 2. Ordinary type: with symptoms such as fever, nasal congestion, runny nose, sore throat, etc. Pneumonia can be seen on imaging. 3. Severe type: the patient presents with shortness of breath, decreased oxygen saturation, and lung imaging shows significant progression of >50% of the lesion within 24-48 hours. 4. Critical: Patients may present with respiratory failure, shock, and combination of other functional failures. Among the diagnosed cases of CKP, the symptoms of children are relatively mild, and some children and newborns have atypical symptoms, such as vomiting, diarrhea and other gastrointestinal symptoms, or only poor response, shortness of breath and other symptoms. Those who have been vaccinated and those infected with the Omicron strain tend to be asymptomatic and mildly ill. Tip: In this article, “new coronavirus pneumonia” and “new coronavirus pneumonia” were renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.