In 1918 the United States experienced one of the worst epidemics in its history. With 500,000 dead in a matter of 6 months, the Spanish influenza left its mark. With approximately 11.7 million dead worldwide, Acquired Immune Deficiency Syndrome(AIDS) is still leaving its mark. It is a pandemic the likes of which the world has always feared to see. The HIV virus comes in several varieties, yet they kill basically the same. Our understanding of this virus and how it works is essential to finding its cure, and to preventing its spread. Who it affects and the reasons for its spreading are also important to fight a