article_snippet: Scientists say understanding AIDS's origins will help predict the future risk of an outbreak.
article_snippet: Group 'M' gave rise to the AIDS pandemic - infecting over 40 million people worldwide by spreading across Africa and throughout the rest of the world.
article_snippet: A conceptual image of a HIV infected cell is pictured .
article_snippet: But 'O' - although not as widespread and prevalent as 'M' - has nonetheless infected about 100,000 people in west central Africa.
article_snippet: A new book claims the AIDS epidemic began in a rainforest in southeastern Cameroon in 1908 and not more than 70 years later when the AIDS epidemic started to be recognized in the early 1980s.
article_snippet: This led David Quammen to believe the birthplace of the AIDS epidemic was the southeastern edge of Cameroon sometime around 1908.
article_snippet: a hunter in the rainforest likely infected at least one other person through sex and the AIDS epidemic continued to make the AIDS epidemic way down the Sangha River in that matter until the AIDS epidemic reached the city of Leopoldville (now Kinshasa) in the Congo.
article_snippet: After reaching the Congo, the AIDS epidemic spread even faster via the continued re-use of hypodermic syringes at health clinics, David Quammen said.
article_snippet: This told us HIV-1 groups.'
article_snippet: The origin of HIV has baffled scientists since 1984 when The origin of HIV was first shown The origin of HIV causes AIDS.