In general, you can determine whether you are infected with New Crown virus by combining the epidemiologic history, clinical manifestations, chest CT examination, hematological tests, and pathogenetic tests. 1. Epidemiological history: history of traveling to a medium-high risk area within the past 14 days or contact with a confirmed patient with NCR. 2. Clinical manifestations: symptoms such as fever, malaise, cough and some atypical symptoms such as diarrhea and sore throat. 3. Chest CT: Chest CT can show lung changes similar to those of new coronavirus pneumonia. 4. Hematological examination: blood routine may show normal or low white blood cells and normal or low lymphocytes. 5. Pathogenetic examination: Viral nucleic acid test is performed, which is the gold standard to confirm the diagnosis of new coronavirus infection. A positive result indicates infection with the new coronavirus, while a negative result indicates that the new coronavirus has not been detected. If you suspect that you are infected with the new coronavirus, it is recommended that you go to the hospital or other nucleic acid sampling sites for sampling and testing as soon as possible to avoid delaying your condition. Tip: “New coronavirus pneumonia” and “new coronavirus pneumonia” mentioned in this article have been renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.