11/06/2026
Since October 2025, a suspected measles outbreak affected children across Greater Tonj, with Tonj South hardest hit.
This outbreak was laboratory confirmed in March 2026. Cumulatively, a total of 531 suspected cases and 12 deaths were recorded. Only one of the affected children was vaccinated. This means that 99% of the affected children had missed their routine vaccinations due to disrupted outreach services, compounded by long distances to health facilities, flooding, insecurity, poor road conditions, and limited funding.
In response, Ministry of Health - Republic of South Sudan, with support from WHO - Republic of South Sudan and partners including Médecins Sans Frontières / MSF, Amref Health Africa, South Sudan Red Cross, and In-Deep and Truth Ministries (IDAT), conducted a reactive measles vaccination campaign from 2 to 9 May 2026. In just eight days, over 28,000 children were vaccinated, achieving 97% administrative coverage across all five payams, including hard-to-reach areas. In turn, no new suspected or confirmed measles case has been detected for now 6 epidemiological weeks, confirming interruption of transmission.
Thanks to funding from EU Civil Protection & Humanitarian Aid and Gavi, the Vaccine Alliance, this achievement highlights the power of coordinated action in protecting children and preventing further spread of vaccine-preventable diseases. Continued investment in routine immunization and outreach services remains critical to safeguard every child.