1. Infectious Disease Surveillance Unit, Seychelles Public Health Laboratory, Public Health Authority, Ministry of Health, Victoria, Seychelles;
2. Université de La Réunion, UMR PIMIT (Processus Infectieux en Milieu Insulaire Tropical), INSERM U 1187, CNRS 9192, IRD 249, Plateforme de Recherche CYROI, Sainte Clotilde, France;
3. Disease Surveillance and Response Unit, Epidemiology and Statistics Section, Public Health Authority, Ministry of Health, Victoria, Seychelles;
4. Regional Office of the French Institute for Public Health Surveillance (Santé Publique France), Saint-Denis, France