WHO Weekly Situation Update on Ongoing Health Emergency Events in South Sudan - Week #: 19 ; Date: 15th May 2026

# South Sudan’s Fragile Health Gains Hang in the Balance as Overlapping Crises Persist, WHO Update Warns The World Health Organization’s May 15, 2026 Week 19 situation report for South Sudan lays bare a country locked in a near-permanent public health emergency, where decades of conflict, climate instability, and systemic underinvestment have created a perfect storm for recurring disease outbreaks—and where hard-won progress in reducing mortality is at constant risk of collapse. Since gaining independence in 2011, South Sudan has been trapped in repeated cycles of intercommunal and political violence, producing some of the world’s highest rates of internal displacement. As of mid-2026, an estimated 2 million people remain displaced, the vast majority packed into overcrowded camps with little to no access to clean drinking water, functional sanitation, or formal healthcare. Recurrent climate shocks have only amplified these vulnerabilities: seasonal flooding inundates as much as 40% of the country’s land area in severe years, while prolonged dry spells drive widespread water scarcity, elevating risks of both waterborne and vector-borne disease outbreaks across all 10 states. The latest WHO update confirms multiple active outbreaks remain under active surveillance as of the reporting period, including resurgent cholera and measles epidemics that have spread across multiple states in the first half of 2026. Persistent malaria transmission, the leading cause of death for children under 5 in the country, adds an additional, constant layer of strain on an already overwhelmed health system. Displacement, damaged road networks, and active security constraints in large swathes of the country continue to block access to affected populations, delaying delivery of life-saving interventions including vaccines, oral rehydration salts, and insecticide-treated malaria bed nets. Despite these steep operational barriers, the update highlights tangible, measurable progress in preparedness and response over the reporting period. Joint initiatives led by the South Sudan Ministry of Health, WHO, UNICEF, and local and international NGOs have expanded community-based disease surveillance networks, trained hundreds of frontline health workers to identify and report suspected cases of outbreak-prone illnesses, and rolled out targeted vaccination campaigns that reached more than 120,000 children under 5 for measles and polio in the first four months of 2026 alone. Emergency cholera treatment centers have been established in 12 high-risk counties, with the case fatality rate for cholera falling from 2.1% in late 2025 to 1.3% as of mid-May 2026. Still, the report cautions that these gains are far from secure. A $32 million funding shortfall for the 2026 humanitarian health response plan threatens to disrupt ongoing vaccination campaigns, outbreak response activities, and support for frontline health facilities. Evolving risks, including above-average seasonal rainfall forecasts for the second half of 2026 that could trigger catastrophic widespread flooding, and ongoing security incidents that restrict humanitarian access, pose immediate threats to recent improvements in health outcomes. The stakes extend far beyond South Sudan’s borders. Uncontrolled outbreaks of vaccine-preventable diseases or cholera in the country carry a high risk of spreading to neighboring Ethiopia, Kenya, Uganda, and the Democratic Republic of the Congo, driven by high levels of cross-border population movement. Sustained investment in South Sudan’s health system and emergency response capacity is not just a local priority: it is a critical component of global efforts to advance universal health coverage and reduce excess mortality in fragile, conflict-affected settings worldwide.