Unrest following Côte d'Ivoire's presidential election is blocking a nationwide vaccination drive against yellow fever, a fatal mosquito-borne disease that is affecting people throughout the country. In the past month 11 people have died in the centre-north departments of Séguéla, Katiola, and Béoumi; two cases of yellow fever have been confirmed and there are a further 21 suspected cases in those departments and in nearby Mankono, according to local health workers and the World Health Organisation (WHO).