Key Points 

Leptospirosis 

• The seasonal resurgence of leptospirosis has entered a decline phase following an epidemic peak in March. To date, 195 locally acquired cases have been reported.

Dengue and Chikungunya

• 48 cases of chikungunya and 250 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 

• Increase in health and virological indicators with no public health impact.

Bronchiolitis in children under 2 

• Health indicators are declining, and there is no circulation of RSV.

Acute gastroenteritis

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

COVID-19 

• No health impact in hospitals and no circulation of SARS-CoV-2.

Smallpox B (Mpox)

• 17 cases (including 12 imported cases) were reported in Réunion between S05 and S24/2026.