Human immunodeficiency virus or HIV is a disease like no other. A virus studied for more than 30 years, yet no vaccine was developed. HIV which causes AIDS (Acquired Immunodeficiency syndrome) was believed to be present in North America, Europe, and Africa for several decades before the earliest cases appeared in 1980 (Mann, 1989). There are several theories behind the origin of HIV. The simian immunodeficiency virus (SIV) found in chimpanzees, is believed to have been transmitted to …showed first 75 words of 1640 total…

…showed last 75 words of 1640 total…until then research must continue to study and develop vaccines that will save the lives of millions of people worldwide. References Mann J. M (1989) AIDS: A worldwide pandemic, in Current topics in AIDS, volume 2, edited by Gottlieb M.S., Jeffries D.J., Mildvan D., Pinching, A.J., Quinn T.C., John Wiley & Sons Lovgren (2003) HIV Originated With Monkeys, Not Chimps, Study Finds, National Geographic. www.news.nationalgeographic.com/news/2003/06/0612_03062_hivvirusjump.html. Retrieved May 22, 2005