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Scientists Use Polio Virus to Fight Brain Tumors

Though it's hard to imagine the polio virus doing anything but harm, researchers are now using it for a positive purpose: to attack cancer cells in the brain. A team at Duke University is using a modified inactive polio virus to infect tumor cells, setting off an immune response that lasts for several months until often the tumor is gone for good. Dr. Matthias Gromeier began clinical trials over three years ago, and so far, 12 of 20 patients with a type of brain tumor called...

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