The girl whose T cells beat cancer

When Emily Whitehead was six years old, she became the first child to receive genetically modified T cells, an experimental treatment for leukemia. It cured her and helped pioneer the field of cellular medicine. Sunday Morning’s Kelefa Sanneh talks to Emily and her parents Kari and Tom Whitehead about how they beat her cancer; and with Dr. Siddhartha Mukherjee, leading cancer specialist and author of the new book, The Song of the Cell: Exploring Medicine and the New Man.