In addition to epidemiology, clinical manifestations, laboratory tests, imaging and routine blood tests, the diagnosis of neocoronavirus infection also requires viral nucleic acid testing, which is mainly done by taking patients’ nasopharyngeal swabs, sputum, and bronchial secretions to do the viral nucleic acid test, and if the test is positive for nucleic acid, it means that one is infected with neocoronavirus. The sensitivity of nucleic acid test is relatively high, but clinically there are false negatives and false positives, there is a certain degree of test error exists, may be a positive test will be done a second time to further diagnose the infection. However, nowadays, patients will be admitted to the hospital if they are diagnosed with a positive nucleic acid test, and after treatment, they must be negative twice in order to be excluded from isolation. If the nucleic acid is positive, basically the patient’s diagnosis is clear, infected with the virus, must be combined with the clinical manifestations, in the designated hospital isolation and observation, during the hospitalization may have to do another nucleic acid test, to further clarify the diagnosis. Source: Dr. Yurai