Lassa fever: Sierra Leone

The Eastern province (in red on the map) is hyperendemic for Lassa fever, with outbreaks most frequently reported from Kenema and Kailahun districts (towns circled in blue). Patients returning from these areas are at highest risk of infection. The risk of infection is lower in other areas of the country, and is lowest in the Freetown Peninsula.

In 2010 there was a large outbreak in Makeni (Northern province)

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(Map based on United Nations map No. 3902 (Rev. 5), January 2004)

Last reviewed: 20 April 2012