Key points

Smallpox B (Mpox)

• 8 cases (including 4 imported cases) were reported in Réunion between S05 and S13/2026.

Leptospirosis

• A seasonal resurgence of leptospirosis is currently underway at a high level: 142 cases in 2026.
• The number of cases reporting activities with a risk of infection linked to freshwater recreation is higher this year than in 2025.

Dengue and Chikungunya

• 26 cases of chikungunya and 82 cases of autochthonous dengue detected since the beginning of the year, with clusters of dengue cases observed in Saint-Leu and Saint-Paul.

Influenza and Flu-Like Illness

• Emergency room visits are on the rise, but with no significant public health impact.

Bronchiolitis in children under 2

• Health indicators show very low intensity and no circulation of RSV for several weeks, based on hospital virological surveillance.

COVID-19

• Health and virological indicators are declining.

Gastroenteritis

• Indicators are stable and fluctuating at a low level.