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NCI Dictionary of Cancer Terms

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simian virus 40  listen  (SIH-mee-un VY-rus…)

  A virus that infects some types of monkeys. It may also infect humans, and was found in some polio vaccines tested in the early 1960s. Although the virus has been shown to cause cancer in laboratory animals, there is no evidence that it causes cancer in people. Also called SV40.