Antigen testing for neocoronaviruses is usually done by poking the nose. Antigen detection of New Crown Virus is usually done by poking the nose with a nasal swab rather than poking the throat. The procedure, first of all, you need to clean the mucus in the nasal cavity, and then use the nasal swab to slowly enter 1~1.5 centimeters along the lower nasal passage, and then tightly rotate the nasal cavity for about 4 weeks, and use the same method to test the other nasal cavity. The antigen test for the new coronavirus is to be performed according to the operating instructions. If two bars appear, it is considered positive, and the patient should be hospitalized immediately for isolation. The antigen test for New Coronavirus can be done on its own. However, some people do not follow the instructions properly, and there may be errors or false positives. It is best to check the nucleic acid of the new crowns in the hospital for clarification.