University of New South Wales (UNSW) - School of Women’s and Children’s Health, Sydney Children's Hospital - Respiratory Department, Children’s Hospital at Westmead - The National Centre for Immunisation Research and Surveillance (NCIRS), Royal Hobart Hospital - Paediatric Department, Perth Children’s Hospital - Wesfarmer's Centre for Vaccines and Infectious Diseases, Perth Children’s Hospital - Wesfarmer's Centre for Vaccines and Infectious Diseases, University of New South Wales (UNSW) - School of Women’s and Children’s Health, Institute of Clinical Pathology and Medical Research - Centre for Infectious Diseases-Public Health, Queensland Paediatric Infectious Diseases Laboratory - Children’s Health Queensland, Children’s Hospital at Westmead - The National Centre for Immunisation Research and Surveillance (NCIRS), University of Adelaide - Vaccinology and Immunology Research Trials Unit, Perth Children's Hospital - Department of General Paediatrics, Charles Darwin University - Child Health Division, Monash Children’s Hospital - Department of Respiratory Medicine, The Centenary Hospital, Children’s Hospital at Westmead, Children’s Hospital at Westmead - The National Centre for Immunisation Research and Surveillance (NCIRS), Institute of Clinical Pathology and Medical Research - Centre for Infectious Diseases-Public Health, University of Melbourne, University of Melbourne - Department of Respiratory and Sleep Medicine, University of Queensland - Child Health Research Centre, University of Queensland - Child Health Research Centre, Alice Springs Hospital - Department of Paediatrics, Children’s Hospital at Westmead, University of New South Wales (UNSW) and Charles Darwin University - Menzies School of Health Research