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Nature 407, 117 (14 September 2000) | doi:10.1038/35025249

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Tests fail to support claims for origin of AIDS in polio vaccine

David Dickson

The hypothesis that AIDS has its origins in a contaminated polio vaccine used in Africa in the late 1950s suffered a significant knock this week. Tests on samples of the vaccine, in storage for over 40 years, have shown no trace of HIV or its primate antecedent SIV.