Two bars on the self-test nucleic acid test generally refers to the new crown antigen test. According to research, two bars on the self-test is not necessarily a confirmed positive diagnosis, and a number of errors in the testing process can lead to false positives. The new crown antigen test can lead to false positives and false negatives, if the self-test antigen test result of two bars is not necessarily infected, you need to go to the nucleic acid test to confirm, the confirmation of the diagnosis is based on the results of the nucleic acid test. It is recommended that the self-test results for two bars, to maintain a good state of mind, do not fear panic, home isolation, such as fever, cough and other symptoms, can be symptomatic treatment, if the symptoms worsened, timely medical treatment.