At least 90 people have died and more than 12,000 others have been infected in a fast-spreading cholera outbreak in Nigeria’s conflict-battered Borno state, the United Nations Office for the Coordination of Humanitarian Affairs (OCHA) confirmed on Thursday. The grim figures mark a sharp escalation in a public health emergency that began in early May and has overwhelmed already fragile health systems across one of the country’s most troubled regions.
The cholera crisis in Borno, a state in northeastern Nigeria that has endured nearly two decades of violent extremism from the Boko Haram insurgent group, has now spread to 14 of the state’s 27 local government areas. Aid organizations and medical personnel on the ground say the pace of new infections shows no sign of slowing, with hundreds of new cases reported each day. Health workers have warned that the true scale of the outbreak may be even greater, as data from several treatment centers and oral rehydration points had not yet been fully integrated into official counts.
Cholera is a waterborne disease caused by the bacterium Vibrio cholerae, typically contracted through contaminated water or food. It thrives in environments with poor sanitation and limited access to clean water, particularly in remote communities that are out of reach of health authorities. According to government data, only 32 percent of Nigeria’s more than 200 million people have access to safely managed drinking water services, a statistic that helps explain why cholera has remained a recurring and often deadly challenge across the country since the first recorded outbreak in 1972. Between 2021 and 2025 alone, Nigeria registered approximately 159,698 cases and nearly 5,000 deaths attributed to the disease.
The current outbreak is compounded by the protracted humanitarian crisis in northeast Nigeria. Years of insurgency-driven displacement have left communities with damaged infrastructure, overstretched clinics, and severely limited access to basic services. Open defecation, broken water pipes, and ineffective drainage systems in densely populated Maiduguri have all contributed to the rapid spread.
Authorities have been criticized for the slow pace of their response. Reports indicate that the Borno State Ministry of Health delayed issuing a formal public alert even as cases mounted, and that the state water board has been slow to address broken pipes despite repeated warnings. Health experts say addressing cholera in Nigeria demands more than emergency medicine. It requires sustained investment in water and sanitation infrastructure, waste management, and functional primary healthcare. The Nigeria Center for Disease Control and Prevention has acknowledged that cholera vaccines are available only in limited quantities at private facilities, as a global surge in demand has caused severe shortages that are affecting the country’s outbreak response.
Public health experts have urged the federal and state governments to go further, calling for transparent reporting on investments in water access, accountability from the Northeast Development Commission, and a multi-sectoral approach that brings environmental, governance, and health agencies together to address the root conditions that allow cholera to persist.
With the death toll now at 90 and the number of infections surpassing 12,000, the UN and humanitarian partners are racing to contain what has become one of the most severe cholera emergencies in Nigeria in recent years. According to experts, whether the response will be enough to stop further loss of life depends not only on medical intervention but on the political will to finally fix the broken infrastructure that leaves millions of Nigerians vulnerable to a disease that is entirely preventable.
