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: 114 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

• 21 cases of chikungunya and 51 cases of locally acquired dengue have been detected since the beginning of the year, with clusters of dengue cases observed in Saint-Leu and Saint-Paul.

Influenza and Flu-Like Illness

• Low health and virological indicators with no public health impact.

Bronchiolitis in children under 2

• Health and virological indicators at a very low level.

COVID-19

• Health and virological indicators are declining.

Gastroenteritis

• Fluctuating activity at a low level, with an upward trend since Week 7 among children under 5 years of age.