More than 300 suspected cases and 27 deaths, mostly children. That is what a vaccine gap looks like when it becomes a grave.
Diphtheria is not a mysterious disease. We have known how to prevent it for decades. It spreads through respiratory droplets and close contact, but it only kills in large numbers where routine immunisation has failed. The current outbreak is therefore not a medical mystery; it is a systems failure.
Nigeria has been battling this since Kano in 2022. The lesson from Kano and subsequent outbreaks was clear: low childhood immunisation coverage, delayed diagnosis and poor access to diphtheria antitoxin allow a preventable disease to turn fatal. Yet here we are again, with the same pattern.
What frustrates scientists is that we are not short of answers. We are short of speed and discipline. Vaccination remains the most powerful tool, but coverage remains patchy. When children miss their pentavalent doses, we create a reservoir for Corynebacterium diphtheriae to thrive. When that reservoir is in crowded schools and communities, 300 cases can emerge in weeks.
Closing schools temporarily can slow transmission, but it cannot close the immunity gap. Only vaccines can. That is why ring vaccination around confirmed cases — households, schools, markets, places of worship — must start immediately. Routine immunisation must also be audited honestly, not defended.
The second gap is treatment. Diphtheria antitoxin is life-saving only when given early. If it is stocked only in Abuja or Lagos while children are dying elsewhere, the gap between drug and patient becomes another grave. Every teaching hospital and general hospital in affected zones must have it now.
The third gap is surveillance. We need labs to confirm cases, check whether vaccinated children actually developed immunity, and characterise the circulating strains. Without that, we are fighting blind.
Neighbouring states should not wait for deaths to act. They should check their vaccine stocks and strengthen surveillance today.
A vaccine in a cold chain does not save a child. A vaccine in a child does. Until we close that last-mile gap, we will continue to dig small graves for a preventable disease.
