The numbers are rising. The fatality rate is higher than last year. And most Nigerians still remain unaware of the warning signs.
A Deadlier Season
Nigeria is in the grip of one of its most alarming Lassa fever seasons in years. The Nigeria Centre for Disease Control and Prevention (NCDC) has confirmed that deaths from Lassa fever have risen to 167 in 2026, even as the number of newly confirmed weekly cases has begun to decline.
That detail — fewer new cases, more deaths — is the most troubling part of this outbreak.
The case fatality rate (CFR) stands at 25.2 per cent, significantly higher than the 18.5 per cent recorded during the same period in 2025.
In plain terms, one in four confirmed patients is dying. A total of 663 confirmed cases have been recorded out of 3,831 suspected cases across 22 states and 93 local government areas so far in 2026. This is not a localised crisis. It is a national one.
Where It Is Hitting
Bauchi, Taraba, Ondo, and Edo — account for 89 per cent of all confirmed cases in 2026. But the disease has spread well beyond its traditional hotspots. In the latest reporting week, cases were recorded across seven states: Edo, Bauchi, Ondo, Taraba, Ebonyi, Benue, and Kaduna.
The age group most affected is young adults between 21 and 30, with cases ranging from as young as one to as old as 74 years. No age group is safe. But Nigeria’s most economically active generation is bearing the heaviest burden.
Healthcare workers have also been hit hard — at least 37 medical professionals contracted the virus in the first nine weeks of 2026 alone.
When hospitals become a source of transmission rather than safety, the system’s capacity to respond is directly undermined.
What Is Lassa Fever — And How Do You Get It?
Lassa fever is an acute viral haemorrhagic illness caused by the Lassa virus. It is primarily transmitted through contact with food or household items contaminated by rodents — specifically the urine and faeces of infected Mastomys rats.
The disease is endemic in West Africa and appears annually in Nigeria. But the dry season creates conditions that amplify risk dramatically. Dry weather provides favourable conditions for Mastomys rats to interact with humans more frequently, while high population density and challenges in sanitation amplify exposure.
Lassa fever is not easily identifiable in its early stages. Symptoms can mimic malaria or typhoid — fever, weakness, headache, sore throat, nausea, vomiting, and chest pain. In severe cases, it progresses to haemorrhaging, organ failure, and death. That diagnostic ambiguity is part of why so many cases are caught too late.
Why People Are Dying at a Higher Rate
Persistent challenges driving the high fatality rate include late presentation of cases, poor health-seeking behaviour, and the high cost of treatment. Poor environmental sanitation and low awareness in high-burden communities are also key factors.
In short: people are not going to the hospital early enough — and when they do, treatment is either unavailable or unaffordable. The availability of ribavirin, hospital readiness, and community awareness are among the factors that determine outbreak response effectiveness.
Ribavirin — the primary antiviral treatment for Lassa fever — must be administered early to be effective. Once symptoms are severe, outcomes worsen sharply.
Poverty, inadequate housing, limited sanitation, and high levels of human-rodent interaction amplify risk, while public health infrastructure and community awareness determine the effectiveness of response efforts.
What the Government Is Doing
The NCDC has not been idle. The agency has activated a multi-partner incident management system to coordinate national response efforts, and in collaboration with WHO, UNICEF, and Médecins Sans Frontières (MSF), has intensified surveillance, contact tracing, and public awareness campaigns.
National Rapid Response Teams have been deployed to seven high-burden states following a pre-deployment briefing to ensure preparedness for outbreak containment. A high-level field mission was also conducted in Bauchi State with support from MSF.
The NCDC has also called on state governments to intensify year-round community engagement — not just crisis-response efforts when cases spike, but sustained prevention education that reaches rural communities before the dry season begins.
What You Can Do Right Now
The NCDC and public health experts are clear on prevention. Here is what every Nigerian household should know and act on:
Store food safely. Keep all food — including grains, vegetables, and leftovers — in sealed containers that rodents cannot access. Do not leave food uncovered overnight.
Control rodents in and around your home. Seal entry points, use traps, and clear waste and debris that attract rats. The Mastomys rat thrives in cluttered environments close to human habitation.
Maintain clean surroundings. Regular sweeping, disposal of rubbish, and clearing of outdoor areas reduce rodent activity significantly.
Know the symptoms — and act fast. Fever, fatigue, headache, sore throat, vomiting, and muscle pain appearing together should prompt immediate medical attention. Do not wait for symptoms to worsen. Early treatment with ribavirin is significantly more effective.
Do not self-medicate. Because Lassa fever resembles malaria and typhoid early on, many patients take antimalarials and antibiotics at home and delay hospital visits. This is a critical mistake. If you live in or have recently visited a high-burden state, tell your doctor.
Healthcare workers: apply strict infection control. Use personal protective equipment consistently, and treat every haemorrhagic fever presentation with high suspicion, particularly in endemic areas.
The Bigger Picture
Nigeria recorded around 215 deaths from Lassa fever in 2025. The acceleration of deaths in 2026 signals an outbreak that is deadlier and more complex to manage. The disease is not new. The conditions that drive it — poverty, inadequate housing, poor sanitation, limited healthcare access — are not new either.
What is new is the urgency. A 25.2 per cent case fatality rate is not a statistic. It is a signal that the gap between those who need care and those who receive it in time is widening — and that without sustained community-level intervention, the numbers will keep rising.
Lassa fever is preventable. It is treatable. And with the right information, thousands of Nigerian lives can be saved.
Visit the WHO official website below for more information. https://www.afro.who.int/health-topics/lassa-fever
