West and Central Africa mean annual rainfall (1951–1989), Lassa fever nosocomial outbreaks (stars) and human seroprevalence (numbers in %). The Kenema District of Sierra Leone is indicated by a white star. Adapted from Fichet-Calvet and Rogers, 2009 .
Kelly et al. BMC International Health and Human Rights 2013 13:2 doi:10.1186/1472-698X-13-2