AIDS is a chronic, life-threatening condition caused by the human immunodeficiency virus (HIV). Anyone of any age, race, sex or sexual orientation can be infected with HIV. By damaging your immune system, HIV interferes with your body’s ability to fight off viruses, bacteria and fungi that cause disease. HIV makes you more susceptible to certain types of cancers and to infections your body would normally resist, such as pneumonia and meningitis. The virus and the infection itself are known as HIV. “Acquired immunodeficiency syndrome (AIDS)” is the name given to the later stages of an HIV infection.