In Nigeria, from 3 to 30 January 2022, 211 laboratory confirmed Lassa fever cases including 40 deaths (case fatality ratio: 19%) have been cumulatively reported in 14 of the 36 Nigerian states and the Federal Capital Territory across the country (Figure 1). Three states account for 82% of confirmed cases: Ondo (63), Edo (57) and Bauchi (53). The other states affected are Benue (11), Ebonyi (5), Oyo (5), Taraba (5), Kogi (4), Enugu (2), Kaduna (2), Cross River (1), Delta (1), Katsina (1) and Plateau (1) (Figure 2).Of the 211...