Martin Gorsky is Senior Lecturer in the Contemporary History of Public Health at the London School of Hygiene and Tropical Medicine. He most recently co-authored Mutualism and Health Care: hospital contributory schemes in twentieth century Britain. Sally Sheard is Senior Lecturer in History of Medicine at the University of Liverpool. She co-edited Body and City: histories of urban public health. Her most recent co-authored book is The Nation’s Doctor: the role of the Chief Medical Officer, 1855–1998.