HIV tests are mainly laboratory tests, including human immunodeficiency virus (HIV) antibody tests, qualitative and quantitative HIV nucleic acid tests, etc. The laboratory test for antibodies is divided into two stages: the initial screening test and the confirmatory test. If both tests are positive, the diagnosis of AIDS is confirmed. The initial screening test can be done at home with HIV test strips or by going to the hospital to have blood drawn for HIV antibodies. After the initial screening test is positive, the blood is then sent to the CDC to complete the confirmatory test, and the test result is also positive to confirm the diagnosis of AIDS. However, it is important to note that the initial screening test can be false negative or false positive and is not completely accurate. Also, there is a window period after HIV infection, and if the antibody is still negative three months after the high-risk behavior, the probability of HIV infection is low. In addition to laboratory tests, the doctor may also conduct some physical examinations and epidemiological tests to make the test results more comprehensive and accurate. Once diagnosed, patients need to take medication and follow up regularly as prescribed by the doctor. AIDS mainly attacks the human immune system, so the lymphocyte count will drop, so patients need to follow up with routine blood tests on time to reduce the risk of concurrent diseases. At present, drugs for AIDS treatment are provided free of charge by the state. Patients must actively cooperate with their doctors to minimize risks and harm.