Recent work in the mobilities literature has highlighted the importance of thinking about mobility and immobility as a continuum, where movement intersects with processes that might entail episodes of transition, waiting, emptiness, and fixity. This focus on stillness, things that are stuck, incomplete or in a state of transition can point to new theoretical, methodological and practical dimensions in social studies of medicine. This edited volume brings the concept of immobility to the forefront of social studies of medicine to explore how immobility shapes processes of medical care and the theoretical and methodological challenges of studying immobility in medical contexts. The authors in this volume draw from a wide range of case studies across the globe to make contributions to our current understanding of health, illness and medicine, mobilities and immobilities. Chapter 2 "Lists in Flux, Lives on Hold? Technologies of Waiting in Liver Transplant Medicine" is available open access under a Creative Commons Attribution 4.0 International License via link.springer.com.