A new crown antigen test with two lines, one dark and one very light, is positive, but does not confirm the diagnosis. If both the “C” and “T” bands appear on a new crown antigen test, the “C” line is usually darker, purple or red, and the “T” line is lighter. The “C” band is usually darker, purple or red, and the “T” band is lighter, indicating a positive antigen test. However, the sensitivity of the antigen test is lower than that of the nucleic acid test, so when the antigen test is positive, it can only be used as an aid and cannot confirm the diagnosis, and it is necessary to carry out further nucleic acid test, and if the result of the nucleic acid test is positive, then the diagnosis can be confirmed as positive. If you find yourself testing positive for antigen, it is recommended that you go to the hospital for nucleic acid testing to make a definitive diagnosis.