Government of the United Kingdom - Public Health Scotland, University of Edinburgh - Centre for Global Health Research, University of Edinburgh - Usher Institute, Government of the United Kingdom - Public Health Scotland, Government of the United Kingdom - Public Health Scotland, Government of the United Kingdom - Public Health Scotland, Government of the United Kingdom - Public Health Scotland, Government of the United Kingdom - Public Health Scotland, Government of the United Kingdom - Public Health Scotland, Government of the United Kingdom - Public Health Scotland, Government of the United Kingdom - Public Health Scotland, Government of the United Kingdom - Public Health Scotland, London School of Hygiene & Tropical Medicine - Faculty of Epidemiology and Population Health, University of Glasgow - Institute of Health and Wellbeing, University of Glasgow - MRC/CSO Social and Public Health Sciences Unit, University of St. Andrews - School of Medicine, University of Edinburgh - Usher Institute of Population Health Sciences and Informatics, University of Strathclyde - Department of Mathematics & Statistics, University of Edinburgh - Usher Institute, Government of the United Kingdom - Public Health Scotland and University of Edinburgh - Usher Institute

Government of the United Kingdom - Public Health Scotland, University of Strathclyde - Department of Mathematics & Statistics, Government of the United Kingdom - Public Health Scotland, Government of the United Kingdom - Public Health Scotland, Government of the United Kingdom - Public Health Scotland, Government of the United Kingdom - Public Health Scotland, Government of the United Kingdom - Public Health Scotland, Government of the United Kingdom - Public Health Scotland, affiliation not provided to SSRN, University of Glasgow - Medical Research Council (MRC), University of Edinburgh - Usher Institute, University of Edinburgh, University of Oxford - Nuffield Department of Primary Care Health Sciences, Government of the United Kingdom - Public Health Scotland, Government of the United Kingdom - Public Health Scotland and Government of the United Kingdom - Public Health Scotland

Nanjing Medical University - School of Public Health, Nanjing Medical University, University of Edinburgh - Usher Institute, Utrecht University - Department of Pediatrics, University of Washington - Division of Allergy and Infectious Diseases, University of Cape Town (UCT) - Department of Pediatrics and Child Health, University of Edinburgh, Wuhan University, Nanjing Medical University, University College Hospital, University of Birmingham, Shenzhen Children’s Hospital, Hospital Clínic de Barcelona, University of Turku, Pontificia Universidade Catolica do Rio Grande do Sul (PUCRS) - Centro Infant, University Hospital Würzburg - Division of Paediatric Infectious Diseases, University of Split, Ohio State University (OSU), University of the Witwatersrand - Vaccines and Infectious Diseases Analytics Research Unit, Medical University of Graz - Research Unit for Neonatal Infectious Diseases and Epidemiology, MAHAN Trust Mahatma Gandhi Tribal Hospital, National University of Singapore (NUS), University of Colorado at Denver - Department of Pediatrics and University of Edinburgh - College of Medicine & Veterinary Medicine

Imperial College London - National Heart and Lung Institute, The University of Manchester, University of Nottingham, University of Dundee, Imperial College London - National Heart and Lung Institute, University of Liverpool, University of Edinburgh, Imperial College London - Imperial NIHR Patient Safety Translational Research Centre, University of the West of England (UWE), University of Edinburgh - Usher Institute, University of Nottingham, University of Oxford - Nuffield Department of Primary Care Health Sciences and Imperial College London - National Heart and Lung Institute