Key Points 

Leptospirosis 

• The seasonal resurgence of leptospirosis has entered a decline phase following an epidemic peak in March. To date, 196 locally acquired cases have been reported.

Dengue and Chikungunya

• 46 cases of chikungunya and 231 cases of locally acquired dengue have been detected since the beginning of the year. The weekly number of dengue cases remains stable.

Flu-like syndrome 

• No public health impact.

Bronchiolitis in children under 2 

• Health indicators on the rise.

Acute gastroenteritis

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

COVID-19 

• No health impact in hospitals.

Smallpox B (Mpox)

• 15 cases (including 10 imported cases) were reported in Réunion between S05 and S23/2026.