Nigeria Centre for Disease Control and Prevention (NCDC) has confirmed 145 deaths from Lassa fever in 2025.
Latest situation report released on Friday by the NCDC for epidemiological week 24, shows that the country recorded 766 confirmed cases from 5,678 suspected infections.
The fatality rate stood at 18.9 per cent, up from 17.6 per cent during the same period in 2024.
NCDC said the states most affected were Ondo, Bauchi, Edo, Taraba and Ebonyi, which accounted for 91 per cent of the confirmed cases.
It said that Ondo alone contributed 31 per cent, making it the epicentre of the outbreak.
The agency attributed the new development to late presentation of cases, poor health-seeking behaviour and unsanitary living conditions in high-burden communities.
It appealed to the public to avoid contact with rodents and to seek prompt medical care at designated treatment centres at the first sign of symptoms, such as fever, headache or bleeding, as it continues to strengthen efforts in curtailing the spread of the disease.