HIV is a serious health threat. It weakens the immune system and attacks the body with various opportunistic infection. It destroys the defense mechanism of the body. HIV if not treated correctly ends with AIDS. The main fighting cells in the body is CD4 cells, HIV enters in this cells and destroys the healthy cells. Onaway to know if the person has AIDS, is to test about CD4 counts in the blood. The count less than 200 is suggestive of AIDS. But its true some people live without AIDS for many years and some get infected easily with AIDS. HIV is mainly spread through sex, but there are other agents too. Like semen, body fluid, vaginal fluid, breast milk and some fluids when healthcare workers are handling are spinal cord fluid, bone joints fluids. Commonly HIV can pass from person...