Antigen detection reagents are generally referred to as neocoronavirus antigen detection reagents. Haloing of neocoronavirus antigen detection reagents may be caused by factors such as irregular operation, unqualified reagents, or infection with neocoronavirus. New crown antigen test reagents are used for self-antigen detection, so as to detect the presence of new coronavirus infection in the organism. There are many reasons for the haloing of the results of the new coronavirus antigen test reagent. It may be that the patient did not operate the test correctly, resulting in excessive secretion of the sample and haloing of the results, which should be required to be tested again in such cases. If the reagents for the new crown antigen test are substandard, expired or spoiled, this will lead to a substantial reduction in accuracy when performing the new crown antigen test, and haloing may also occur. It should also be considered to be the result of the patient’s infection with the novel coronavirus. There are a number of reasons for haloing of the new coronary antigen test. To determine whether or not the patient has the new coronary virus, it is recommended that the patient go to the local immunization agency for further clarification, such as the new coronary virus nucleic acid test.