London School of Hygiene & Tropical Medicine - Department of Clinical Research, University of Oxford - Oxford Vaccine Group, University of Oxford - Oxford Vaccine Group, Children's Liver Disease Foundation, Children's Liver Disease Foundation, London School of Hygiene & Tropical Medicine - Department of Clinical Research, Imperial College London - Section of Infectious Diseases and Immunity, Government of the United Kingdom - Public Health England, Government of the United Kingdom - Public Health England, Public Health England - Immunisation, Hepatitis, and Blood Safety Department, University of Oxford - Oxford Vaccine Group, University of Oxford - Uehiro Centre for Practical Ethics and University of Oxford - Oxford Uehiro Centre for Practical Ethics