Key Points

Chikungunya

• After 5 weeks of intense epidemic activity peaking in Week 16, all indicators have been steadily declining since Week 17, confirming that Réunion is in the epidemic decline phase.

• However, the epidemic level remains high on the island.

• Importation pressure into mainland France remains high, with no locally acquired cases identified to date.

Leptospirosis

• Seasonal resurgence underway Amid a declining but still active chikungunya epidemic across the entire island, it is important to consider the diagnosis of leptospirosis to ensure prompt management (antibiotic treatment under medical supervision) and limit the risk of severe illness or even death.

Acute respiratory infections

• Respiratory viruses are circulating at a moderate rate with no significant public health impact.

Acute gastroenteritis

• Surveillance indicators in community practice and hospitals (all ages combined) remain at a low level with very limited public health impact.