Lassa fever Fact sheet N°179 Updated March 2015 13 March 2015 Key facts Lassa fever is an acute viral haemorrhagic illness of 1-4 weeks duration that occurs in West Africa. The Lassa virus is transmitted to humans via contact with food or household items contaminated with rodent urine or faeces. Person-to-person infections and laboratory transmissionContinue reading “LASSA FEVER: KEY FACTS”