Acquired Immune Deficiency Syndrome, or AIDS, is a serious disease. It is the last stage of a virus called Human Immuno-deficiency Virus, HIV. The disease renders the body's immune system. When this happens, the body is unable to resist invasion by microorganisms that cause serious infectio...

Mononucleosis Mononucleosis is an infectious disease found in humans, in which the blood and tissues contain mononuclear leukocytes. These are white blood cells with only one nucleus, either monocytes or lymphocytes. An infectious disease is a disease that can give you an infec...