The chances of a 2-bar positive New Crown Antigen test are about 75% to 99%, which means that there may be false positives and further testing is required. New Crown Antigen refers to the New Crown Antigen Test, which has been shown in clinical studies that the chances of proving positive for 2 bars of the New Crown Antigen Test are about 75% to 99%, which means that there is a possibility of false positives for 2 bars of the New Crown Antigen Test. Currently, the antigen detection reagents used in China have a sensitivity of 75% to 98% and a specificity of 95% to 99%. The new crown antigen test is a direct detection of the virus, which is less accurate than nucleic acid testing and is generally used in the early stages of new coronavirus infection. Nucleic acid testing, on the other hand, remains the basis for confirming the diagnosis of neocoronavirus infection. Therefore, patients who are suspected to be positive for the 2-bar neocoronavirus antigen test need to be screened with further nucleic acid testing. In conclusion, antigen test can only be used as a supplementary means, and those who are suspected to be positive need to go to the hospital for relevant examinations in a timely manner, and strengthen the management of daily life in order to avoid delaying the disease.