In the New Crown Virus Antigen Test C is the quality control area on the test strip and T is the detection area. The C zone on the New Crown test kit indicates whether the reagent is valid or not. If no result appears in the C zone, the test is invalid and needs to be retested. It makes sense to look at the T zone results with a positive C zone. On top of a positive C zone, a positive T zone, i.e., the presence of a dark or light red line, indicates a positive test for the new coronavirus; if the T zone is negative, i.e., no red line appears, it indicates no infection. Antigen detection can be applied to early screening of novel coronavirus infections, which is beneficial for outbreak prevention and control. The accelerated spread of the Omicron variant has increased the difficulty of outbreak prevention and control. Antigen testing, as a complementary means of screening, can be used to screen suspected infected populations more quickly. It is important to note that a positive antigenic test for the new coronavirus requires a review of the nucleic acid test, with the nucleic acid test result as the final standard.