A positive neo-coronavirus test is usually a positive nucleic acid test result on a nasal swab, pharyngeal swab, anal swab, etc. If a positive result is present, you may have New Coronavirus infection, which is usually abnormal. If a nucleic acid test result for New Coronavirus pneumonia shows a negative result, it generally indicates that the patient is not infected by New Coronavirus. However, due to the sampling site, the time of onset of the patient, etc., the nucleic acid test for the new coronavirus has a certain degree of false negativity, which is not necessarily normal in this case, which means that a single negative nucleic acid test for the new coronavirus does not absolutely rule out the possibility of a new coronavirus infection. If the chest CT and X-rays show small patches and interstitial changes or solid lung changes, and if routine blood tests, blood biochemistry, and blood gas analysis indicate a decrease in white blood cells and lymphocytes, and the second nucleic acid test is still positive, then this indicates the presence of neointimal infection and requires prompt isolation and symptomatic treatment. If the above-mentioned chest CT, X-ray and blood test results are normal and the secondary nucleic acid test shows negative, then it indicates that no neointimal infection has occurred and is normal at this time. Prevention is the main focus of this disease. Wearing a mask when going out, not going to crowded areas, disinfecting at home regularly, and washing hands regularly can greatly reduce the chance of infection.