Nigeria Centre for Disease Control (NCDC)Karolinska Institutet - Department of Global Public Health, Nigeria COVID-19 Research Coalition, Karolinska Institutet - Department of Global Public Health, Nigeria Centre for Disease Control (NCDC), University of Nottingham - Division of Epidemiology and Public Health, Nigeria Centre for Disease Control (NCDC), Irrua Specialist Teaching Hospital - Institute of Lassa Fever Research and Control, Nigeria Centre for Disease Control (NCDC), Nigeria Centre for Disease Control (NCDC), African Union - Africa Centres for Disease Control and Prevention, Nigeria Centre for Disease Control (NCDC), Nigeria Centre for Disease Control (NCDC), Nigeria Centre for Disease Control (NCDC), Karolinska Institutet - Department of Global Public Health, Lagos State Ministry of Health, Nigeria Centre for Disease Control (NCDC), Nigeria Centre for Disease Control (NCDC), Mainland Hospital - Infectious Disease Unit, University of Benin - Department of Microbiology, Nigeria Centre for Disease Control (NCDC), Nigeria Centre for Disease Control (NCDC), Nigeria Centre for Disease Control (NCDC), Nigeria Centre for Disease Control (NCDC), University of Abuja, Nigeria - University Of Abuja Teaching Hospital, World Bank, Nigeria Centre for Disease Control (NCDC), Nigeria Centre for Disease Control (NCDC), Adamawa State Ministry of Health and Human Services, Tony Blair Institute for Global Change, Nigeria Centre for Disease Control (NCDC), Irrua Specialist Teaching Hospital - Institute of Lassa Fever Research and Control, Mainland Hospital - Lagos State Biobank, Nigeria Centre for Disease Control (NCDC), Nigeria Centre for Disease Control (NCDC), Ministry of Health (Nigeria), Nigeria COVID-19 Research Coalition, Maryland Global Initiatives Corporation, Nigeria Centre for Disease Control (NCDC), Nigeria Centre for Disease Control (NCDC), Nigeria Centre for Disease Control (NCDC), National Hospital Abuja - Department of Internal Medicine, Kaduna State Ministry of Health - Kaduna State Infectious Disease Control Centre, Nigeria Centre for Disease Control (NCDC), Nigeria Centre for Disease Control (NCDC), Bauchi State Ministry of Health, Kwara State Ministry of Health, Resolve to Save Lives (Nigeria), Nigerian Institute of Medical Research, World Health Organization (WHO), Nigeria Centre for Disease Control (NCDC), Nigeria Centre for Disease Control (NCDC), Nigeria Centre for Disease Control (NCDC), Nigeria Centre for Disease Control (NCDC), Public Health England - International Health Strengthening Project, World Health Organization (WHO), University of Nebraska at Omaha - Department of Pediatrics, Nigeria COVID-19 Research Coalition, Nigeria COVID-19 Research Coalition, College Of Health Sciences, Usmanu Danfodiyo University, University of Benin - Department of Community Health, University of Benin - Centre of Excellence in Reproductive Health Innovation, Nigeria COVID-19 Research Coalition, University College London - Institute for Global Health, Karolinska Institutet - Department of Global Public Health, Nigeria Centre for Disease Control (NCDC) and Nigeria Centre for Disease Control (NCDC)

Karolinska Institutet - Department of Medical Epidemiology and Biostatistics, Karolinska Institutet - Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Karolinska Institutet - Department of Medical Epidemiology and Biostatistics, Karolinska Institutet - Department of Medical Epidemiology and Biostatistics, Sachs' Children and Youth Hospital, Karolinska Institutet - Department of Global Public Health, Lund University, Lund University, Karolinska Institutet, University of New South Wales (UNSW) and Karolinska Institutet - Department of Medical Epidemiology and Biostatistics

University of Toronto - The Hospital for Sick Children - SickKids, Karolinska Institutet - Department of Global Public Health, Tampere University - Center for Child Health Research, Johns Hopkins University - School of Hygiene and Public Health, University of the Witwatersrand, Aga Khan University - Institute for Global Health and Development, University of the Witwatersrand, United Nations - Food and Agriculture Organization (FAO), Gates Ventures, World Health Organization (WHO), University of Edinburgh - Usher Institute, Indian Council of Medical Research (ICMR) - National Institute for Research in Tuberculosis, University of Toronto, University of Toronto - Centre for Global Child Health and Aga Khan University

St. George’s University of London, St. George’s University of London, Oswaldo Cruz Foundation (FIOCRUZ) - Center for Data and Knowledge Integration for Health (CIDACS), London School of Hygiene & Tropical Medicine - Faculty of Epidemiology and Population, Health, Imperial College London, Karolinska Institutet - Department of Global Public Health, University of Rwanda, University of Oklahoma - University of Oklahoma Health Sciences Center, Mater Dei Hospital - Department of Paediatrics and Adolescent Health, St. George’s University of London, St. George’s University of London, St. George’s University of London, St. George’s University of London and Université de Kinshasa - Département de Microbiologie

Karolinska Institutet - Department of Medical Epidemiology and Biostatistics, Karolinska Institutet - Department of Medical Epidemiology and Biostatistics, Karolinska Institutet - Department of Medical Epidemiology and Biostatistics, Karolinska Institutet - Department of Medical Epidemiology and Biostatistics, University of Helsinki - Institute for Molecular Medicine Finland (FIMM), University of Helsinki, Karolinska Institutet - Department of Global Public Health, Karolinska Institutet - Department of Medical Epidemiology and Biostatistics and Karolinska Institutet - Department of Medical Epidemiology and Biostatistics

University of Southern California Institute on Inequalities in Global Health, Harvard School of Public Health, Karolinska Institutet - Department of Global Public Health, UNAIDS and Tulane University - Law School

Imperial College London - Section of Paediatric Infectious Disease, Government of the United Kingdom - Institute of Cancer Research, Mater Dei Hospital, Imperial College London, affiliation not provided to SSRN, Fondazione Policlinico Universitario A. Gemelli IRCCS - Department of Woman and Child Health and Public Health, University of Padua - Department of Woman’s and Child’s Health, Imperial College London - Department of Epidemiology and Biostatistics, Imperial College London, Ospedale Paediatrico Meyer Firenze, Leicester University, Karolinska Institutet - Department of Global Public Health, Jean Verdier Hospital, University College Dublin (UCD) - Women’s and Children’s Health, Louis Mourier Hospital, Erasmus University Rotterdam (EUR) - Department of General Paediatrics, affiliation not provided to SSRN, Paracelsus Medical University Salzburg, Tallaght University Hospital, Children’s Health Ireland, University of Szeged - Albert-Szent Györgyi Medical Centre, Hospital Universitario Cruces, Medical University of Vienna, Sorbonne University - Pediatric Emergency Deparment, Government of the United Kingdom - Birmingham Women’s and Children’s NHS Foundation Trust, Ludwig Maximilian University of Munich (LMU), Lithuanian University of Health Sciences, Medical University of Graz, affiliation not provided to SSRN, University of the West of England (UWE), Coimbra Hospital and University Centre (CHUC), Hospital Dr. Fernando da Fonseca, Alder Hey Children's NHS Foundation Trust, Ondokuz Mayis University, Riga Stradins University, Centro Hospitalar Tondela-Viseu, Association Clinique et Thérapeutique Infantile du Val-de-Marne (ACTIV), Karolinska Institutet, Hacettepe University Medical School, Mersin City Training and Research Hospital, Barnaspitali Hringsins Children's Hospital, Hospital Río Hortega de Valladolid, Padua University and Hospital, Erasmus University Rotterdam (EUR) - Department of General Paediatrics, Erasmus University Rotterdam (EUR) - Department of General Paediatrics and Hôpital Robert Debré