Polio may seem out of date in the U.S., but its vaccine may be leading to a new medical breakthrough.
A modified polio vaccine injected into patients' deadly brain tumors helped reverse their "dismal" diagnoses, a report in The New England Journal of Medicine suggests. The survival rate for stage IV gliomas — a common type of brain tumor — is usually less than 20 months, and there's no effective treatment. But some of these tested patients are still alive after six years.
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