University of Liverpool, University of Melbourne - Murdoch Children's Research Institute, University of Malawi - Malawi-Liverpool-Wellcome Trust Clinical Research Programme, University of Melbourne - Murdoch Children's Research Institute, University of Malawi - Malawi-Liverpool-Wellcome Trust Clinical Research Programme, University of Malawi - Malawi-Liverpool-Wellcome Trust Clinical Research Programme, University of Melbourne - Murdoch Children's Research Institute, University of Melbourne - Murdoch Children's Research Institute, University of Malawi - Malawi-Liverpool-Wellcome Trust Clinical Research Programme, University of Melbourne - Murdoch Children's Research Institute, University of Melbourne - Murdoch Children's Research Institute, University of Melbourne - Infection and Immunity, University of Malawi - Malawi-Liverpool-Wellcome Trust Clinical Research Programme, University of Liverpool - NIHR Health Protection Research Unit in Gastrointestinal Infections, Global BioSolutions, University of Melbourne - Murdoch Children's Research Institute, University of Melbourne - Murdoch Children's Research Institute, Murdoch Children's Research Institute, University of Liverpool - Center for Global Vaccine Research and University of Melbourne - Murdoch Children's Research Institute