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Science 23 June 2000:
Vol. 288. no. 5474, pp. 2164 - 2165
DOI: 10.1126/science.288.5474.2164
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Searching for the Epidemic's Origins

Jon Cohen

EASTERN GABON--Theories about the origin of AIDS all suffer from a dearth of data. For more than a decade, researchers have recognized the close genetic links between SIV from sooty mangabeys and HIV-2, a type of the virus that is mostly confined to west African countries, but to date, there are scant data that closely link HIV-1, the predominant human AIDS virus, to SIVs found in primates.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)