Dr. Patrick Hwu speaks with Dr. John Wherry, a world-renowned expert in T-cell biology and director of the Institute for Immunology and Immune Health at the University of Pennsylvania. Dr. Wherry reflects on his early interest in science and explains how chronic stimulation can cause T cells to become exhausted, limiting their ability to fight cancer and persistent infections. The conversation explores how immunotherapies such as PD-1 blockade can reinvigorate exhausted T cells, why some patients do not respond, and how the tumor microenvironment and epigenetic scarring shape immune function. Dr. Wherry also discusses the future of personalized immunotherapy, the importance of mentorship and collaboration, and how music inspires creativity in both science and life.

What You’ll Learn with Dr. John Wherry

• Why T cells “burn out” and what that means for cancer treatment
• How today’s most successful immunotherapies work to release the immune system’s brakes
• Why immunotherapy doesn’t work for every patient—and how researchers are working to change that
• How a tumor’s “neighborhood” can influence the immune system’s ability to fight cancer
• The promise of reprogramming exhausted immune cells to create more effective cancer treatments
• Where cancer immunotherapy is headed next, from personalized approaches to new vaccine strategies