
Scientist Myung-Haing Cho of South Korea modified a lentivirus (HIV is a commonly known example of a lentivirus) to treat lung cancer in mice with spectacular results.
This treatment has now been used on a handful of human patients.
One of whom was a six-year-old girl dying of Leukemia.
Her story is amazing and gives hope that the The Emperor of All Maladies, as Siddhartha Mukherjee named it, will soon be dethroned.