How Lassa Fever Exposed Nigeria’s Weak Disease Surveillance System

Nigeria’s next outbreak risks becoming a full-blown crisis as the country’s disease detection system steadily weakens and loses the capacity to catch threats early enough.

Development Diaries reports that in early April 2026, a Lassa fever outbreak was confirmed in Katsina State, where two people died and three cases were recorded.

While the Nigeria Centre for Disease Control issued its routine alert and health officials responded as expected, what did not make the headlines is the fragile condition of the very surveillance system that made that detection possible in the first place.

Nigeria has handled outbreaks before and often with global applause, from Ebola to Covid-19 and mpox, but behind those success stories sits a system heavily supported by external actors like the World Health Organisation and the US Centers for Disease Control.

That means each response Nigerians celebrate has quietly depended on funding and technical support that does not originate within the country, and as those global commitments begin to shrink, the foundation they were holding up is starting to show cracks.

The uncomfortable truth is that Nigeria’s disease surveillance system is like a house built with borrowed scaffolding, stable as long as the owners of the scaffolding keep it in place but dangerously exposed the moment they decide to take it back.

Recent shifts in global health financing, especially under the administration of US President Donald Trump, have already signalled that this withdrawal is an ongoing reality.

At the same time, another problem is growing inside the system itself, because even when outbreaks are detected, the ability to correctly identify them is no longer reliable, as a report released in April 2026 by the National Bureau of Statistics (NBS) shows that diagnostic accuracy among Nigerian health workers has dropped to 46.1 percent.

What that means is that in too many cases, the difference between early detection and delayed response is about whether the right call is made at the right time.

This is where the situation moves from worrying to dangerous, because a surveillance system that depends on external funding and a workforce struggling with diagnostic accuracy creates a double weakness, one where outbreaks may either go undetected or be misdiagnosed long enough to spread.

Nigeria has consistently treated health spending as an afterthought, with budget allocations remaining below five percent of national expenditure despite the Abuja Declaration’s 15 percent target, and each year this gap is filled by donors, the country moves further away from owning its own health security.

Years of underinvestment in training, poor access to diagnostic tools in primary healthcare centres, and the steady migration of skilled professionals have all combined to weaken the human backbone of the system.

For communities in northern Nigeria, where diseases like Lassa fever are more common, women who serve as primary caregivers are often the first to be exposed, and community health workers, many of whom are women operating at the frontlines, are expected to detect and respond to outbreaks with limited training and resources.

What makes the situation even more troubling is that the laws and commitments already exist, because Nigeria is bound by the African Union’s health frameworks and its own constitutional obligation to provide adequate healthcare.

If funding continues to shrink and diagnostic capacity continues to decline, the next outbreak may arrive quietly, spread quickly, and only become visible when it is already too large to ignore.

For a country that has already paid the price of delayed responses in the past, waiting for that moment to act would be a policy failure.

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