Antigen testing generally refers to the new coronavirus antigen test, the new coronavirus antigen test kit has been officially launched, compared with the nucleic acid test is more convenient, faster, suitable for all people to carry out antigen testing. The test is mainly suitable for people with obvious symptoms and those who need to be observed in isolation according to the relevant requirements, while other people can also purchase the test by themselves. 1. People with obvious symptoms: if there are obvious symptoms such as dry throat, cough, chest tightness, fever, or even difficulty in breathing within 7 days, it is suspected of novel coronavirus infection, and antigen testing is recommended to confirm whether there is novel coronavirus infection; 2. Close contact and sub-close contact with novel coronavirus infected persons, home isolation, inbound isolation, as well as people in closed control areas and control areas, should conduct antigenic self-testing under the organization and management of the relevant management departments; 3. Others: If you feel unwell or have the need for self-testing, you can also conduct antigenic testing. In addition, it is recommended that when performing antigen testing, you need to read the instructions carefully, and keep your hands and kits clean, and follow the steps in the instructions to ensure the accuracy of the test results. It is also important to note that the antigen test results are only used as supporting evidence to confirm the diagnosis of novel coronavirus infection, and nucleic acid testing is still needed to confirm the diagnosis if necessary.