1. Population, Policy and Practice Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, University College London , London, UK
2. Research Department of Targeted Intervention, Division of Surgery & Interventional Science, Faculty of Medical Sciences, University College London , London, UK
3. Immunisations and Vaccine Preventable Diseases, UK Health Security Agency , London, UK
4. Department of Psychiatry, University of Cambridge, Hershel Smith Building Cambridge Biomedical Campus , Cambridge, UK
5. Division of Neuroscience, School of Biological Sciences, University of Manchester, Manchester Academic Health Science Centre , Manchester, UK
6. Child and Adolescent Mental Health Services, Royal Manchester Children’s Hospital, Manchester Academic Health Sciences Centre , Manchester, UK
7. Mohn Centre for Children’s Health & Wellbeing, School of Public Health, Imperial College London , London, UK
8. NIHR Health Protection Research Unit in Emerging and Zoonotic Infections, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool , Liverpool, UK
9. Respiratory Medicine, Alder Hey Children’s Hospital , Liverpool, UK