Country: Nigeria Sources: Health Cluster, World Health Organization Please refer to the attached file. This Situation Report provides an update on the cholera outbreak response in Borno State, Nigeria, covering the period from 1 to 25 May 2026. As of 25 May 2026, a cumulative 2,918 cholera cases and 27 associated deaths had been reported across seven LGAs, with a case fatality rate (CFR) of 0.9%. The report highlights ongoing transmission, water source contamination risks, and response activities including surveillance, laboratory testing, case management, WASH/IPC, risk communication, community engagement, and multisectoral coordination.