08/10/2026
Ministry of Health and WHO join hands to step up campaign against measles in Ulaanbaatar City
As measles cases have declined in recent months, Mongolia is stepping up efforts to close the current outbreak and protect the population against the risk of recurrence. To support this effort, the Ulaanbaatar City Health Department and the National Expanded Programme on Immunization (EPI) of the National Center for Communicable Diseases (NCCD), with technical support from WHO, conducted a rapid assessment of the measles outbreak response and routine immunization programme to identify priorities for closing remaining immunity gaps and strengthening protection against measles across the capital city.
The main aim of this support is to provide technical guidance to the Ministry of Health and NCCD to identify and reach every child who has been missed or is under-vaccinated, including through supplementary immunization activities (SIAs). These efforts will help close immunity gaps, strengthen population immunity, and reduce the risk of future measles outbreaks. Strengthened microplanning and targeted vaccination activities will ensure that vulnerable and hard-to-reach children are systematically identified and vaccinated.
The rapid assessment examined the outbreak situation, immunity gaps, vaccination performance, surveillance, service delivery, and the quality of immunization and population data.
Mongolia's response to the 2025-26 measles outbreak included the activation of national and subnational coordination mechanisms, strengthened outbreak investigation and clinical management, an uninterrupted supply of measles-containing vaccines, and catch-up vaccination through fixed, mobile, temporary, and school-based vaccination points. These efforts expanded access to vaccination services and strengthened the response to the outbreak.
Although measles cases have declined in recent months, immunity gaps remain among infants and older children. Missed vaccinations, population mobility, and data quality challenges also require continued attention. Of the 22 reported measles-related deaths during the outbreak, 20 occurred among infants, underscoring the importance of protecting the youngest and most vulnerable populations.
The review identified opportunities to further strengthen targeted vaccination, district microplanning, follow-up of missed and mobile children, engagement with schools, and the use of updated immunization and population data to guide decision-making. These findings will help translate the assessment findings into practical actions to reach children who have been missed, close remaining immunity gaps, strengthen population immunity and prevent future measles outbreaks.
Protecting every child today helps prevent the outbreaks of tomorrow.