1. Oxford Vaccine Group, Department of Paediatrics, University of Oxford , Oxford , United Kingdom
2. Institute for Infection and Immunity, St George’s University , London , United Kingdom
3. BUGS Bioscience, London Bioscience Innovation Centre , London , United Kingdom
4. Immunology, National Institute for Public Health and the Environment , Bilthoven , The Netherlands
5. National Institute for Health Research Oxford Biomedical Research Centre , Oxford , United Kingdom, and
6. National Institute for Health Research Clinical Research Network Thames Valley and South Midlands , Oxford , United Kingdom