The death toll from Lassa fever in Nigeria has risen to 109 within the first nine weeks of 2026, reflecting a sharp increase compared to figures recorded during the same period last year.
Data released by the Nigeria Centre for Disease Control showed that fatalities climbed from 99 to 109 in just one week, raising fresh concerns about the spread and severity of the disease.
Health authorities also reported a worrying rise in infections among medical personnel. At least 37 healthcare workers have contracted the disease so far this year, with six new cases recorded in a single week.
According to the agency, cases have now been confirmed in 18 states across 69 local government areas, with the highest burden concentrated in a few regions.
“About 86 per cent of confirmed cases are from Bauchi, Ondo, Taraba, Benue and Edo states,” the NCDC said.
A breakdown of the data indicates that Bauchi accounts for the largest share of infections at 28 per cent, followed by Ondo with 22 per cent and Taraba at 19 per cent. Benue and Edo states recorded nine and eight per cent respectively.
The NCDC further noted that the case fatality rate currently stands at 23.2 per cent, higher than the 18.7 per cent recorded within the same period in 2025.
“Cumulatively, 109 deaths have been reported so far in 2026, with a higher fatality rate compared to last year,” the agency stated.
The most affected age group falls between 21 and 30 years, while the ratio of male to female cases stands at 1:0.8.
Despite the rise in deaths, the NCDC observed that the total number of suspected and confirmed cases has declined compared to 2025 figures. However, it expressed concern over the continued exposure of healthcare workers.
“Six healthcare workers were infected in the latest reporting week, highlighting ongoing risks in clinical settings,” the agency added.
To curb the spread, the NCDC has urged state governments to strengthen year-round community sensitisation and preventive measures, while advising health workers to maintain a high index of suspicion for early detection.
The agency also outlined steps already taken, including national briefings, dissemination of updated infection prevention guidelines, and activation of emergency response systems in affected states.
However, several challenges persist.
The NCDC identified late presentation of cases, poor health-seeking behaviour due to treatment costs, and inadequate environmental sanitation as key factors fueling the outbreak.
