Key Points 

Leptospirosis 

• The seasonal resurgence of leptospirosis has begun to decline following an epidemic peak in March. To date, 191 locally acquired cases have been reported.

Dengue and Chikungunya

• 49 cases of chikungunya and 203 cases of locally acquired dengue have been detected since the beginning of the year.
• A downward trend in the number of dengue cases appears to have begun and will need to be confirmed.

Flu-like syndrome 

• No public health impact.

Bronchiolitis in children under 2 

• Health indicators at a very low intensity level.

Acute gastroenteritis

• Health indicators have remained stable over the past few weeks.

COVID-19 

• No health impact in hospitals.

Smallpox B (Mpox)

• 12 cases (including 6 imported cases) were reported in Réunion between S05 and S21/2026.