Last night, the hit CBS news program 60 Minutes revisited a trial at Duke University that it had devoted two segments to early last year. Scientists at Duke are testing a modified form of the polio virus to treat glioblastoma, and the reason for the 60 Minutes update was that the research has recently been granted “breakthrough” status by the FDA—which may shave some time off the development pathway. The development of engineered viruses, or “oncolytic viruses,” to treat cancer is one type of immunotherapy that’s generating excitement in oncology circles.

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