NavGeneral InfoEmail Print Provider World Health Organization (WHO) Geography Sierra Leone (SLE) Coverage type Country Time period covered 01/1950 - 12/2004 Data type Epi surveillance Keywords Yellow fever Citation Contributors World Health Organization (WHO) Publisher World Health Organization (WHO) Publication year 2005 Suggested citation World Health Organization (WHO). Yellow Fever Trends Over Time Country Profiles - Sierra Leone 1950-2005. Geneva, Switzerland: World Health Organization (WHO), 2005. GHDx Entry last modified on: May 1, 2019