Emily's parents watched as these two rival forces – cancer and chemotherapy – attacked their daughter's body."She was in very, very deep medical trouble," said Dr. Siddhartha Mukherjee, a leading cancer specialist and researcher at Columbia University in New York, and the Pulitzer Prize-winning author of "The Emperor of All Maladies: A Biography of Cancer."His latest book, "The Song of the Cell: An Exploration of Medicine and the New Human" (published by Simon & Schuster, a division of our parent company, Paramount Global), highlights Emily's case, among others.Mukherjee said, "What happened in Emily's case is that there was so much cancer in her body that we build in an amplification signal, so that the more they harpoon, the more angry they get, so there they are, getting angrier and angrier and angrier, and at a certain point of time your body can't tolerate this angry rampage.""As we enter and manipulate more and more cells, cells in the cartilage, cells in the pancreas, to cure type 1 diabetes, potentially cells in the brain to cure depression and schizophrenia, we are living in an age where cells have become an amenable unit of therapy.""