Gene therapy scores big wins against blood cancers

This Nov. 18, 2013 photo provided by the The Children's Hospital of Philadelphia shows Emily Whitehead, 8, 20 months after T Cell Therapy treatment in Philadelphia. In one of the biggest advances against leukemia and other blood cancers in many years, doctors are reporting unprecedented success by using gene therapy to transform patients' blood cells into soldiers that seek and destroy their cancer. (AP Photo/The Children's Hospital of Philadelphia, Ed Cunicelli)In one of the biggest advances against leukemia and other blood cancers in many years, doctors are reporting unprecedented success by using gene therapy to transform patients' blood cells into soldiers that seek and destroy cancer.