AIDS can be detected. Once AIDS develops, there will be abnormalities in the test results, such as blood counts, lymphocyte subgroup analysis, and if there is a specific infection in certain parts of the body, there can also be relevant specific changes, such as changes on lung CT. However, the diagnosis of AIDS can not be determined by these test results, the diagnosis must be made through the HIV pathogenetic examination, the more commonly used screening method is now, HIV antibody screening, the initial screening of positive people need to carry out a confirmatory test, confirmatory test is positive, can be diagnosed with HIV infection. People who are positive at the initial screening are required to undergo a confirmatory test. A positive confirmatory test will lead to the diagnosis of HIV infection. Therefore, to check for AIDS, the initial screening and confirmation test for HIV antibodies can be done by drawing blood.