Emma Whitehead was a six-year-old girl battling relapsed leukemia for the third time when her parents were told she had run out of treatments. Her doctors offered one last hope—enrollment in a clinical trial at Children's Hospital of Philadelphia in a completely new immunotherapy. It was a phase I toxicity trial for both children and adult patients, and few patients on phase I trials are ever cured. But Emma's family was given the miracle they had prayed for. Five years later, Emma is now a happy, healthy, 11-year-old girl who likes to play piano and soccer. Emma is cured.