Many children in conflict-affected settings remain unvaccinated, beyond the reach of traditional health systems | Photo Credit: Dawoud Abu Alkas
Despite global advances in immunisation, 14.3 million children worldwide remain unvaccinated. Most live in fragile and conflict-affected settings, where traditional health systems cannot safely and effectively reach them. To address this challenge and serve communities in conflict or crisis zones — some of which haven’t seen a vaccine in over a decade — ZIP, Gavi’s humanitarian partnerships, was launched in 2022, partnering directly with humanitarian organisations to deliver immunisation to communities that government health systems have been unable to reach.
Through community-based and context-adapted strategies, REACH is now delivering more than 1 million vaccine doses every month across a range of life-saving antigens. As the programme has scaled up, average delivery cost per dose has fallen from around $3.75 in the first year to around $2 by September 2025, making routine immunisation increasingly affordable and impactful even in the most fragile environments.
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Published on October 20, 2025
