A nurse giving a baby vitamin A dose during malaria vaccination day at Apac General Hospital on April 8, 2025, in Apac District, Uganda. | Hajarah Nalwadda/Getty Images There’s a “paradox” at work in global health, as the philanthropist Bill Gates wrote last week. Even as funding for global health is declining, the science that supports those efforts is accelerating. And nowhere is that divergence more apparent than in the most important tool in public health: vaccines. Earlier this week Gavi, the Vaccine Alliance — a public-private partnership that does more than any other organizati...

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