Key Points

• 2,289 cases of dengue fever have been reported since the start of the outbreak, including 2,103 confirmed cases in 2020.

• After 4 weeks of stabilization, the number of weekly confirmed cases has been rising for the past 3 weeks.

• The virus has spread throughout the country, with the exception of the Central region.

• DENV-1 is the predominant serotype (DENV-2 identified in 2 imported cases)

• The rainy season is conducive to an increase in the mosquito population

• Dengue epidemics in the Indian Ocean region: risk of importation of new cases and serotypes