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Health Global

Big Catch-Up drive delivers 100 million vaccine doses to 18.3 million children

The Big Catch-Up initiative delivered more than 100 million vaccine doses to an estimated 18.3 million children across 36 countries between 2023 and 2025. The World Health Organization, UNICEF, and Gavi, the Vaccine Alliance jointly confirmed the results on 24 April 2026, reporting the programme is on track to meet its target of reaching 21 million under-vaccinated children.

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Some projects span several world regions. These stories explain the roles of different countries and partners rather than assign shared work to a single place.

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