The weekly situation report on this hemorrhagic fever indicated that the disease has affected 12 states and 70 local government areas, with a Case Fatality Ratio of 18.8 percent.
The confirmed cases were distributed as follows: Ondo (160), Bauchi (122), Edo (88), Taraba (80), Ebonyi (15), Kogi (14), Gombe (11), Plateau (seven), Benue (five), Nasarawa (two), Delta (one), and Cross River (one).
Lassa fever, which typically spreads during Nigeria's dry season, is a zoonotic viral illness transmitted by the common African rat, known scientifically as the Mastomys species.
The report stated, “In week eight, the number of new confirmed cases rose from 38 in epidemiological week seven of 2025 to 54. These cases were identified in Bauchi, Ondo, Edo, Taraba, Ebonyi, Plateau, Benue, and Kogi States.
“Cumulatively, as of week 8, 2025, there have been 95 reported deaths, maintaining a case fatality rate (CFR) of 18.8 percent, consistent with the same period in 2024.
“Overall, in 2025, 12 states have documented at least one confirmed case across 70 local government areas. Notably, 73 percent of all confirmed Lassa fever cases originated from three states: Ondo, Bauchi, and Edo, while the remaining 27 percent were reported from nine other states.
The report highlighted that among the 73 percent of confirmed cases, Ondo accounted for 32 percent, Bauchi for 24 percent, and Edo for 17 percent.
It was also noted that the most affected age group is between 21 and 30 years (with a range from 1 to 94 years and a median age of 30 years), and the male-to-female ratio for confirmed cases stands at 1:0.8.
Additionally, the number of suspected cases has decreased compared to the figures reported during the same period in 2024.
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