New coronavirus refers to a new type of coronavirus, and the detection methods include nucleic acid test, immunological test, and virus culture, etc. It is recommended to consult with a specialist for the specific testing methods needed. 1. Nucleic acid test: It is the main method to detect new coronavirus. Nasopharyngeal swabs or oropharyngeal swabs are often collected and detected by PCR method. A positive test may indicate infection with the novel coronavirus, but false positives and false negatives are also possible. 2. Immunologic testing: (1) Specific antibody detection: collect serum, plasma or whole blood, fasting blood is best, detect IgM, IgG results by chemiluminescence, colloidal gold and fluorescence immunochromatography, appearing positive or weakly positive, it is recommended to combine with nucleic acid results for diagnosis. (2) Antigen detection: direct evidence for early confirmation of infection or not, easy to operate, short reporting time. Nasopharyngeal swabs and alveolar lavage fluid collected from infected areas have low sensitivity and are prone to false negatives. 3. Virus culture: Cell culture isolation of virus is the gold standard for identification. Nasopharyngeal swabs, sputum and other lower respiratory secretions can be cultured, but the culture requirements are high and culture of novel coronavirus is not recommended as a routine diagnostic method. If novel coronavirus infection is detected, isolate and treat promptly.