February 12, 1999

Scientists Say Major Strain of AIDS Virus Came From Chimps

By DAVID L. WHEELER

Scientists said last week that they had identified the origin of the major strain of the virus that causes AIDS in humans: a subspecies of chimpanzee that lives in west-central Africa.

At the Sixth Conference on Retroviruses and Opportunistic Infections, in Chicago, Beatrice H. Hahn, a professor of medicine and microbiology at the University of Alabama at Birmingham, reported the results of molecular tests

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