Public Health Monitoring in Réunion. Bulletin dated September 25, 2026.

Key Points

Arboviral Diseases 

  • Sporadic cases.

Bronchiolitis in children under 1 year of age 

  • No public health impact.

Gastroenteritis 

  • Significant increase in cases in primary care;

Acute respiratory infections 

  • Intensification of the flu epidemic characterized by a sharp increase
    in emergency department visits and hospitalizations. Virus A(H1N1)pdm09 is predominant.

Leptospirosis 

  • Off-season period, low transmission rate with sporadic cases (246 cases and 3 deaths).

Smallpox B (mpox)

  • 24 cases imported from Madagascar and 5 locally acquired cases; the last case was reported in early August.

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