1. College of Medicine and Health Sciences, University of Rwanda, Rwanda;
2. Rwanda Military Hospital, Kigali, Rwanda;
3. Department of Infectious Diseases, Institute of Biomedicine, University of Gothenburg, Sweden;
4. National Reference Laboratory, Rwanda Biomedical Centre, Kigali, Rwanda;
5. Expanded Program on Immunization, Rwanda Biomedical Centre, Kigali, Rwanda;
6. National Centre for Blood Transfusion, Rwanda Biomedical Centre, Kigali, Rwanda