In a Wednesday, April 11, 2018 photo, bag of Makena Eighmy's T cells and other white blood cells hangs beside the bed as she has her cells removed at UW Hospital in Madison, Wis. The cells were shipped to a lab in New Jersey, where a disarmed, HIV-like virus was used to insert a gene into the T cells so they would recognize a marker on Makena's leukemia cells and kill them. (Amber Arnold/Wisconsin State Journal via AP)
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