You can’t tell if it’s New Crown just by the symptoms of a scratchy throat and cough with phlegm. New coronavirus pneumonia is a highly infectious acute pneumonia. After infection with New Crown, some previously vaccinated patients and those infected with the Omicron strain who are predominantly mildly ill may develop symptoms of upper respiratory tract infection such as low to moderate fever, sore throat, occlusion, runny nose, and coughing up sputum. Severe cases are less common and are characterized by acute respiratory distress syndrome, with symptoms such as dyspnea and hypoxemia. In some patients, the first symptom is loss of smell or taste, which is a characteristic symptom of novel coronavirus infection. Meanwhile, about 30% of the patients mainly show conjunctivitis, with pain, itching and tearing in the eyes, as well as conjunctival congestion and edema. These symptoms may be accompanied by respiratory symptoms. Cough sputum alone can not accurately determine the cause, such as bronchial dilatation, pneumonia and other diseases can also cause sputum phenomenon, need to be combined with the characteristics of the medical history, other test results to make an accurate judgment, it is recommended that the cause of the disease under the guidance of a doctor. Tip: The terms “new coronary pneumonia and new coronary virus pneumonia” mentioned in this article were renamed to “new coronary virus infection” on December 26, 2022, as announced by the National Health Commission.