Dr. Suzanne O’Sullivan is a neurologist and award-winning author. In her latest book, The Age of Diagnosis, she tackles the growing crisis of overdiagnosis—how modern medicine's obsession with labels may be doing more harm than good. Drawing from her front-line experience during the COVID-19 pandemic, O’Sullivan reflects on how uncertainty, fear, and the urge to explain the unexplainable shaped her thinking and deepened her understanding of what it truly means to be “sick.”