New Crown Antigen Self Test Kit Two bars are considered positive. If only the C line shows then it is negative; if it shows at both C and T then it is positive; if only the T shows or is colorless then it proves that this result is abnormal and needs to be retested. However, the new crown antigen self-test kit can also make the test result inaccurate under influence. Reasons such as the wrong way of self-testing, contaminated sample collection, etc. can affect the test results, so patients are advised to perform multiple tests to improve the accuracy. If the test is still positive after several self-tests, the patient needs to be in protective isolation at home and contact the community manager to report the results of the self-test. Self-testing for neocoronavirus antigen is only a preliminary diagnostic criterion, and further neocoronavirus nucleic acid testing is needed to confirm the diagnosis. If the diagnosis is confirmed, the patient should not be overly nervous, and should actively follow the doctor’s instructions for treatment. Tip: In this article, the terms “new coronavirus pneumonia” and “new coronavirus pneumonia” were renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.