Dengue in Sierra Leone
Country profile for Sierra Leone (Africa): official dengue surveillance data reported to WHO, analysed by the SENTINARA early-warning engine.
Key facts
- Sierra Leone reported 0 dengue cases from January to August 2026, according to WHO Global Dengue Surveillance.
- Deaths reported in 2026 to August: 0 (0 in the same period of 2025).
- In 2025, the last full year, Sierra Leone recorded 29 cases, an incidence of 0.3 per 100,000 people and a case fatality rate of 51.724%.
- Automatic early-warning analysis is not available because there are fewer than 36 consecutive months of data, too short for seasonal analysis.
Related pages
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.