Published in AIDS Weekly, May 7th, 2001
For years, there has been speculation that the polio vaccine was grown in chimpanzee kidney cell cultures that carried the precursor virus. The virus was then passed to people when the vaccine was administered in Africa in the late 1950s, the hypothesis holds.
But in the April 26, 2001, issue of the journal Nature, scientists in Britain and Sweden report that they found no chimp DNA in a stock of early polio vaccine used in Africa in the 1950s, challenging the hypothesized...
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