|HIV: The Basics|
HIV: The Basics - An Overview
What is HIV?HIV stands for Human Immunodeficiency Virus. HIV is the virus that causes AIDS (Acquired Immune Deficiency Syndrome).
HIV attacks the immune system's soldiers - the CD4 cells. When the immune system loses too many CD4 cells, you are less able to fight off infection and can develop serious opportunistic infections (OIs). A person is diagnosed with AIDS when he or she has less than 200 CD4 cells and/or one of 21 AIDS-defining OIs.