1. Oxford Vaccine Group; Department of Pediatrics; University of Oxford and the NIHR Oxford Biomedical Research Center; Oxford UK
2. Pediatric Infectious Diseases Research Group & Vaccine Institute; Institute for Infection and Immunity; St Georges, University of London & St Georges University Hospitals NHS Foundation Trust; London UK
3. Department of Pediatrics; Imperial College London; London UK
4. Simpson Center for Reproductive Health; Royal Infirmary; Edinburgh UK
5. Bristol Children's Vaccine Center; University Hospitals Bristol NHS Foundation Trust & University of Bristol; Bristol UK
6. Southampton NIHR Wellcome Trust Clinical Research Facility; University Hospital Southampton NHS Foundation Trust & Academic Unit of Clinical and Experimental Sciences; Faculty of Medicine and Institute for Life Sciences; University of Southampton; Southampton UK
7. Population, Policy and Practice Program; UCL Great Ormond Street Institute of Child Health; London UK
8. Department of Pediatric Allergy and Immunology; Royal Manchester Children's Hospital; University of Manchester; Manchester UK