Highlights
• In week 1, the number of new confirmed cases decreased from 70 in epi week 52, of 2024 to 54. These were reported in Ondo, Bauchi, Edo, Taraba, Ebonyi, and Kogi States (Table 3)
• Cumulatively in week 1, 2025, 10 deaths have been reported with a case fatality rate (CFR) of 18.5% which is higher than the CFR for the same period in 2024 (11.3%)
• In total for 2025, 6 States have recorded at least one confirmed case across 20 Local Government Areas (Figures 2 and 3)
• Seventy-eight (78%) of all confirmed Lassa fever cases were reported from these three states (Ondo, Edo, and Bauchi) while 22% were reported from 3 states with confirmed Lassa fever cases. Of the 78% confirmed cases, Ondo reported 35%, Edo 28%, and Bauchi 15%
• The predominant age group affected is 21-30 years (Range: 3 to 70 years, Median Age: 31.5 years). The male-to-female ratio for confirmed cases is 1:0.6 (Figure 4)
• The number of suspected cases increased compared to that reported for the same period in 2024.
• No new Healthcare worker was affected in the reporting week 1.
• National Lassa fever multi-partner, multi-sectoral Incident Management System (IMS) activated to coordinate the response activities at all levels.