AIDS has antibodies and monitoring for HIV antibodies is a common test used to diagnose AIDS. HIV antibodies are a marker of infection, not a protective antibody. AIDS is a chronic infectious disease caused by infection with the human immunodeficiency virus (HIV) and is commonly transmitted through unclean sexual contact, blood-borne contact and vertical mother-to-child transmission. Infection with HIV produces certain antibodies in the body, which indicate HIV infection. Antibody testing requires a screening test and a confirmatory test before HIV infection can be diagnosed. HIV infection causes a progressive decline in the body’s immune function and eventually leads to immune failure, causing various opportunistic infections and malignancies. There is still no effective treatment for AIDS, and most patients have a very poor prognosis and a high mortality rate, so prevention of AIDS should be strengthened and emphasized.