GOING BACK TO THE START
   HIV/AIDS is not a disease that only can affect the human race, but animals as well. The disease has been found in a number of different animals, including cats, sheep, and horses. However, the most interesting case has to be the investigation into the origins of HIV through the Simian Immunodeficiency Virus (SIV) that affects monkeys, which is believed to be at least 32,000 years old. 

   In February 1999 a group of researchers from the University of Alabama made a startling discovery. They discovered that a type of SIV was identical to the HIV we know now. This sample came from a frozen chimpanzee from who's race was once very common in Africa. It is not known exactly how the virus got around to humans, but there are many theories. For example, there is a hunter theory in which the hunter got some chimpanzee blood on him and then went on to spreading it by accident. Most scientists do accept though that it was spread from animal to human through sex. 

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