Explore the current state and future potential of cancer immunotherapy in this 16-minute TED talk by pioneering oncologist Lennie Sender. Gain insights into the immune system's role in disease prevention, the realities of immunotherapy treatments, and their effectiveness against various cancer types. Discover the complexities of cancer care, including topics such as aplastic anemia, graft vs. host disease, T cells, cancer immune editing, and checkpoint inhibitors. Learn about innovative approaches like CAR T-cell therapy and B-cell treatments, while understanding the challenges and costs associated with these cutting-edge solutions. Evaluate the promise and limitations of immunotherapy in cancer treatment through this expert's balanced perspective on its current applications and future possibilities.