AIDS stands for Acquired Immuno Deficiency Syndrome which is a fatal disease caused by a virus known as the Human Immunodeficiency Virus (HIV). The virus of AIDS attacks human white blood cells and thus weakens the immunity system. Since the AIDS virus reduces the natural immunity, patients become more prone to many other infections or diseases, in fact, most patients with AIDS die from what are known as secondary infections. Death occurs because the body cannot repel the pathogens of secondary infections since the natural defence mechanism has been destroyed by the AIDS Virus.