Dengue in Costa Rica
Country profile for Costa Rica (Americas): official dengue surveillance data reported to WHO, analysed by the SENTINARA early-warning engine.
Key facts
- Costa Rica reported 5,302 dengue cases from January to September 2026, +46.5% compared with the same period of 2025, according to WHO Global Dengue Surveillance.
- Deaths reported in 2026 to September: 0 (0 in the same period of 2025).
- In 2025, the last full year, Costa Rica recorded 6,019 cases, an incidence of 116.8 per 100,000 people and a case fatality rate of 0.000%.
- SENTINARA early-warning level for September 2026: Watch, because the last three months are +305.6% above the three months before.
- Ensemble forecast: October 2026 about 956 cases (80% range 637 to 1,433); November 2026 about 773 cases (80% range 421 to 1,417); December 2026 about 566 cases (80% range 268 to 1,193). Backtest MAPE 27.9%, MASE 0.14.
- Cases usually peak in August (based on 12 complete years).
- The anomaly detectors flagged 10 months; the most recent was July 2024 with 4,683 cases.
- OpenDengue holds complete annual totals for Costa Rica since 1980.
- Countries with a similar seasonal pattern: Cambodia, Guatemala, Honduras, Belize, Thailand.
Related pages
- Dengue in Cambodia
- Dengue in Guatemala
- Dengue in Honduras
- Dengue in Belize
- Dengue in Thailand
- Dengue in Ecuador
- Dengue in Peru
- Dengue in El Salvador
- Dengue in Grenada
- Dengue in Trinidad and Tobago
- Dengue in United States
Data updated 2026-10-31. Sources: WHO Global Dengue Surveillance; OpenDengue V1.3 (Clarke et al., 2025), doi:10.6084/m9.figshare.24259573; Dinas Kesehatan Kota Semarang; World Bank Open Data; NASA POWER.