1 National Institute of Public Health, Burkina Faso.
2 Department of Global Health and Development, London School of Hygiene and Tropical Medicine, London, UK; Zentrum Internationaler Gesundheitsschutz, Robert Koch Institute, Berlin 14195, Germany. Electronic address: HanefeldJ@rki.de.
3 Tropical Diseases Research Centre, Ndola, Zambia.
4 Department of Global Health and Development, London School of Hygiene and Tropical Medicine, London, UK.
5 Paediatric Infectious Diseases Research Group, St George's Medical School, London, UK.
6 Charité-Universitätsmedizin Berlin Universität Berlin, Humbolt-Universität zu Berlin, Berlin, Germany; Institute of Virology, Berlin, Germany.
7 Heidelberg Institute of Global Health (HIGH), Heidelberg University Hospital, Heidelberg, Germany; Center for Global Health, Colorado School of Public Health, Aurora, CO, USA.