HIV (human immunodeficiency virus) infects cells of the immune system Infection results in the progressive deterioration of the immune system, breaking down the body’s ability to fend off some infections and other diseases. AIDS (Acquired immune deficiency syndrome) refers to the most advanced stages of HIV infection, defined by the occurrence of any of more than 20 opportunistic infections or related cancers.

HIV can be transmitted in several ways: Unprotected sexual intercourse (vaginal or anal) or oral sex with an infected person; Transfusions of contaminated blood; The sharing of contaminated needles, syringes or other sharp instruments; The transmission between a mother and her baby during pregnancy, childbirth and breastfeeding.