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Published online 26 April 2001 | Nature | doi:10.1038/news010426-12
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The River without a paddle
Four new studies may finally have put paid to the polio-vaccine hypothesis for HIV's origins.
The controversial theory that researchers developing polio vaccines in Africa in the 1950s accidentally triggered today's global AIDS epidemic has today been dealt what could finally be a fatal blow. Four new studies have found no evidence for the main claims of the theory.
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