Vaccinating Britain investigates the relationship between the British public and vaccination policy since 1945. It is the first book to examine British vaccination policy across the post-war period and covers a range of vaccines, providing valuable context and insight for those interested in historical or present-day public health policy debates. Drawing on government documents, newspapers, internet archives and medical texts it shows how the modern vaccination system became established and how the public played a key role in its formation. British parents came to accept vaccination as a safe, effective and cost-efficient preventative measure. But occasional crises showed that faith in the system was tied to contemporary concerns about the medical profession, the power of the state and attitudes to individual vaccines. Thus, at times the British public demanded more comprehensive vaccination coverage from the welfare state; at others they eschewed specific vaccines that they thought were dangerous or unnecessary. Moreover, they did not always act uniformly, with “the public” capable of expressing contradictory demands that were often at odds with official policy. This case study of Britain’s vaccination system provides insight into the relationship between the British public and the welfare state, as well as contributing to the historiography of public health and medicine.