Key Points

• The dengue outbreak continues

• Only the municipality of Salazie has reported no cases. The majority of cases are located in the south (74%), primarily in the municipality of St. Louis (46% of cases).

• Unlike in 2019, in 2020, DENV-1 is the predominant serotype, followed by DENV-2; DENV-3 is primarily found in Saint-André

• The proportion of hospitalized cases is higher in 2020 than in 2019.

• Numerous cases of secondary dengue were detected, with a significant proportion in St. Louis

• More than 30 imported cases in 2020 (travelers returning from Madagascar (DENV2), Mayotte (DENV1), the Comoros, and Tahiti).