Nigeria has recorded 263 deaths from Lassa fever and 1,115 confirmed cases between January and September 20, 2026, according to the Nigeria Centre for Disease Control and Prevention (NCDC).
The figures represent an increase in both infections and deaths compared with the same period in 2025, as the country’s Lassa fever case fatality rate climbed to 23.6 per cent.
In its latest situation report covering September 14 to 20, the NCDC said the fatality rate was higher than the 18.5 per cent recorded during the corresponding period last year.
Nigeria recorded 906 confirmed cases and 168 deaths during the same period in 2025.
The agency also reported 8,218 suspected cases in the first 38 weeks of 2026, compared with 7,792 suspected cases during the corresponding period last year.
Confirmed infections were reported across 119 local government areas in 24 states.
Five States Account for 87% of Cases
Ondo, Bauchi, Taraba, Edo and Benue accounted for approximately 87 per cent of the confirmed infections recorded nationwide.
Ondo State had the highest number of confirmed cases at 393, followed by Bauchi with 260, Taraba with 133, Edo with 122 and Benue with 61.
During the reporting week, the country recorded 11 new confirmed cases and four deaths, while 120 suspected cases were reported.
The weekly number of confirmed infections declined from 17 in week 37, according to the NCDC report.
Young Adults Most Affected
The report identified people aged between 21 and 30 as the most affected age group, although confirmed cases involved patients aged between one and 93 years.
No new infection among healthcare workers was recorded during week 38. However, the cumulative number of healthcare workers affected by the disease stood at 54.
NCDC Identifies Factors Behind Rising Death Rate
The NCDC identified late presentation at health facilities as one of the factors contributing to the rising case fatality rate.
Other challenges highlighted by the agency include the high cost of treatment and clinical management, poor environmental sanitation, limited awareness in heavily affected communities and infections among healthcare workers.
The agency urged state governments to sustain community engagement on Lassa fever prevention throughout the year.
It also called on healthcare workers to maintain a high index of suspicion for the disease, ensure timely referrals and treatment, and comply with infection prevention and control procedures.
NCDC Continues Response Efforts
The NCDC said its ongoing response activities include supporting active case searches and contact tracing, training frontline healthcare workers, distributing protective equipment and maintaining laboratory testing.
The national Lassa fever technical working group is also continuing to coordinate response efforts across different levels of government.
The latest figures highlight the continuing public health challenge posed by Lassa fever in Nigeria, particularly the increase in reported deaths and the higher case fatality rate compared with 2025.