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Acquired Immunodeficiency Syndrome (AIDS) Audio


A disease of the immune system due to infection with HIV. HIV destroys the CD4 T lymphocytes (CD4 cells) of the immune system, leaving the body vulnerable to life-threatening infections and cancers. Acquired immunodeficiency syndrome (AIDS) is the most advanced stage of HIV infection. To be diagnosed with AIDS, a person with HIV must have an AIDS-defining condition or have a CD4 count less than 200 cells/mm³ (regardless of whether the person has an AIDS-defining condition).

See Related Term(s): Acute HIV Infection, AIDS Case Definition, Chronic HIV Infection, HIV Progression, Human Immunodeficiency Virus

Image(s): (Click to enlarge)
Progression of HIV infection to AIDS illustrated with test tubes, CD4 cells, and virions.
Conditions that lead to an AIDS diagnosis

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