HIV (Human Immunodeficiency Virus) infection test includes test paper test and go to the hospital. 1. Test strip test: At present, there are two kinds of HIV self-test paper, one is saliva test paper, which is to take the saliva between the gums as a specimen for testing; the other is blood test paper, which can take the blood from the fingertip or earlobe as a specimen for testing. Self-testing with test strips must be done after the window period, which is generally 2-6 weeks. The test is easy and quick, but the results cannot be used to confirm a diagnosis of HIV. People who test positive must go to the CDC or regular medical institutions for retesting to make a clear diagnosis. 2. Hospital test: The main purpose of the test is to draw blood for immunology or genetics of the virus, including HIV-DNA, HIV-RNA, HIV antibodies, etc. The results of these immunology and genetics indicators will be used to determine the diagnosis of HIV. These immunological and genetic indicators require a relatively short window period, and the test results are more accurate, which is the basis for confirming the diagnosis of AIDS. If high-risk behavior occurs, it is recommended to go to a regular hospital as soon as possible for testing, early screening, early diagnosis, early treatment and intervention to avoid aggravation of the disease.