Half of Known Strains of HIV Originated in Gorillas

March 3, 2015 1:11 AM

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MONDAY, March 2, 2015 (HealthDay News) -- Since HIV first appeared in humans in the early 1980s, scientists have been laboring to discover where and how the AIDS-causing virus first developed.

Now, an international team of researchers says it has confirmed that two of the four known groups of HIV strains affecting humans originated in western lowland gorillas in Africa.

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