Origin of Hiv/aids

 HIV was first identified in the United States in 1981 after a number of gay men started getting sick with a rare type of cancer. It took several years for scientists to develop a test for the virus, to understand how HIV was transmitted between humans, and to determine what people could do to protect themselves.The first registered cases in the U.S. occurred in New York City in 1952, 1959, and 1979. The cases from the 1950s were both males with PCP and other unusual infections. A Congolese man’s blood sample from a medical study was preserved, found, and then analyzed in 1998. It was verified that he had been HIV+. Other suspected, but unverified because of the lack of either blood or tissue samples, cases date back as early as 1934.

On February 1, 2000, M. Korber, et al. reported the results of a phylogenetic statistical analysis of the evolution of the retroviral genome of HIV using complex mathematical models allowing for both constant and variable rates of evolution. Her group’s analysis required the use of supercomputers to backtrack the evolution to its source from monkeys. The most reliable time of origin in humans is somewhere around 1930 (a 95% confidence interval extends from 1910 to 1950).

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    Several naysayer have claimed that the disease originated from the use of African green monkey kidneys to cultivate poliovirus in the late 1950’s and early 1960’s. This analysis finds that argument to be a very low probability event, hence quite unlikely.The hepatitis B vaccine was not considered by this esteemed gathering. Suspiciously neglected, this vaccine was produced in chimpanzees during pilot testing conducted in New York City, among gay men, and Central African villagers between 1972 and 1974. This was precisely timed for the emergence of AIDS in these exact, demographically distinct, communities by the late 1970s. The fact that this fact was neglected proves shoddy science or gross negligence at best.

HIV-2 for example SIV a strain of the Simian Immunodeficiency Virus found in the sooty mangabey (also known as the White-collared monkey), which is indigenous to western Africa. The more virulent, pandemic strain of HIV, namely HIV-1, was until recently more difficult to place. Until 1999, the closest counterpart that had been identified was SIV,the SIV found in chimpanzees. However, this virus still had certain significant differences from HIV. The most commonly accepted theory is that of the ‘hunter’. In this scenario, SIVcpz was transferred to humans as a result of chimps being killed and eaten or their blood getting into cuts or wounds on the hunter.