Clinical trial raises hope for cancer treatment

Researchers have genetically engineered patients' T cells to eradicate cancer cells in a common type of leukemia. Two of three patients studied have been cancer-free for more than a year.In a potential breakthrough in cancer research, scientists at the University of Pennsylvania have genetically engineered patients' T cells — a type of white blood cell — to attack cancer cells in advanced cases of a common type of leukemia.

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