1. Unité d’Epidémiologie des Maladies Infectieuses, Institut Pasteur de Dakar, Dakar, Senegal;
2. Emerging Diseases Epidemiology Unit, Pasteur Institute, Paris, France;
3. National Institute of Health and Medical Research (INSERM), Paris, France;
4. Anthropology and Ecology of Disease Emergence Unit, Pasteur Institute, Paris, France