HIV is a human immunodeficiency virus that can be detected in the semen of an infected person. HIV is mainly found in the blood, semen, vaginal secretions, brain fluid, and breast milk of infected people, so semen can detect HIV. HIV is mainly transmitted through sexual contact, blood transmission, and mother-to-child transmission. Although HIV can be detected in semen, it is mainly detected in blood, saliva and urine samples, and the diagnosis is mainly based on HIV antibodies in blood samples. If you have had high-risk sex, you should go to the hospital in time for the appropriate examination to determine whether you are infected with HIV, early detection of abnormalities, and timely intervention measures.