David Salisbury was director of immunisation at the Department of Health in the UK until the end of 2013. He was responsible for the national immunisation programme and led the introduction of many new vaccines. He is Chair of the Global Commission for the Certification of Poliomyelitis Eradication. He previously chaired the WHO’s Strategic Advisory Group of Experts on Immunisation, the WHO committee that sets global immunisation policy. He also served as co-chair of the Pandemic Influenza group of the G7 Global Health Security Initiative. He trained as a paediatrician in Oxford and London, and is a visiting professor at Imperial College, London, a fellow of the Academy of Medical Sciences and Associate Fellow at the Centre on Global Health Security, Chatham House, London. He continues to lecture and advise on vaccines and vaccination as well as undertaking ongoing work in polio, malaria and the development of new vaccines. He was made a Companion of the Order of the Bath in 2001.