Key Points

• Over the past 6 weeks, there has been an increase in the number of confirmed cases and emergency room visits.

• Active virus outbreaks in Saint-Louis, Saint-Paul, Saint-André, Etang-Salé, and Le Tampon. Isolated cases in 9 other municipalities.

• Identification of the DENV-3 serotype in Saint-André (5 cases), Sainte-Marie (1 case), and Saint-Denis (1 case).

• Widespread co-circulation of DENV-1 and DENV-2 serotypes across the entire island.

• 5 imported cases in 2020 (travelers returning from Madagascar, the Comoros, and Tahiti), including 2 cases serotyped as DENV-2 (Madagascar).