Jacalyn Duffin's History of Medicine is one of the leading texts used to teach the history of the medical profession. Emphasizing broad concepts rather than names and dates, it has also been widely appreciated by general readers for more than twenty years. Based on sound scholarship and meticulous research, History of Medicine incorporates pithy examples from a range of periods and places and is infused with the author’s characteristic wit. The third edition has been completely revised to highlight new scholarship on the past and incorporate significant medical events of the most recent decade – including new technologies, drug shortages, medical assistance in dying, and recent outbreaks of infectious diseases such as Ebola, H1N1, Zika, and COVID-19. The book is organized around themes of scientific and clinical interest, such as anatomy, physiology, pharmacology, surgery, obstetrics, medical education, health-care delivery, and public health. It includes a chapter on how to approach research in medical history, updated with new resources. History of Medicine is sensitive to the power of historical research to inform current health-care practice and enhance cultural understanding.