HIV/AIDS in USA
In 1981, the first case of HIV/AIDS was reported in USA. The immune system of human being is affected in this disease. This is so caused by the function of HIV Virus. HIV stands for Human immune deficiency and AIDS stands for Acquired immune deficiency syndrome which means the weakening of immune system. HIV infection is caused due to the use of contaminated needles in injections, unprotected sex or having sex with the infected partner, from a pregnant woman to the baby during pregnancy or at the time of breast feeding or through blood transfusion from infected person to the healthy person. This disease is taken under consideration because of the fact that the whole world is affected by it. (Bertozzi, Padian, Wegbreit & Feldman, 2006).