Borno cholera outbreak: death toll climbs to 90 as UN warns resources are falling short

The cholera outbreak tearing through northeastern Nigeria has grown deadlier and broader with each passing week. 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-hit Borno State, the UN Office for the Coordination of Humanitarian Affairs said on Thursday.

The death toll, which rose from 74, and the infection count, which climbed from about 7,800 previously reported, reflect the pace at which the outbreak has accelerated since it first emerged in early May.

At the frontline of the response is Médecins Sans Frontières, which has been running treatment centres in Maiduguri in collaboration with the Borno State Ministry of Health. The picture emerging from those facilities is stark. “Every day, we see more people arriving with severe watery diarrhoea and dehydration, many of whom have travelled long distances to reach care,” said Bienfait Tombola, MSF’s project medical coordinator for the surge response in Maiduguri.

MSF established a Cholera Treatment Centre in Ngarannam, Maiduguri, on 7 May 2026, in collaboration with state health authorities. The facility’s capacity has since been expanded from 121 to 271 beds, with further expansion plans underway. A separate 20-bed Cholera Treatment Unit was also opened in the Dalaram area of the state capital to handle the rising case load.

MSF said it had treated 7,439 patients, averaging about 230 admissions per day, with more than 500 cases recorded on June 5 alone — the highest number admitted in a single day since the response began.

The geographic spread of the outbreak underscores its severity. As of June 7, the Borno State Ministry of Health had recorded 7,850 suspected cholera cases across 14 local government areas and 50 wards, with 74 deaths reported at both facility and community levels. The toll has since risen to 90, according to OCHA’s latest update.

The outbreak is straining an already fragile healthcare system in a region at the heart of a 17-year Islamist insurgency, where mass displacement and poor access to water and sanitation have created conditions ripe for the disease to spread.

On the funding side, the UN has moved to activate emergency resources, though agencies say the injection remains insufficient. A $4 million deployment from OCHA-managed funds is bolstering the emergency response, but more resources are urgently needed to strengthen prevention measures and expand treatment capacity as the situation continues to worsen.

OCHA said aid agencies are scaling up treatment, surveillance and access to clean water to support government efforts to contain the outbreak. Authorities are also planning a vaccination campaign as part of efforts to slow transmission.

The Borno crisis lands against an already deeply alarming national food and health security backdrop. Earlier this week, the UN’s FAO and WFP separately elevated northeast Nigeria to their highest-concern category in a global hunger hotspot assessment, warning that up to 15,000 people in Borno face Catastrophe-level food conditions between June and August — a designation reserved for the most extreme cases of starvation and malnutrition worldwide.