A close-up of an adult hand holding a health record card, with a small child’s hand gently grasping one of the adult's fingers. The health record card has text and data entries on it. The background fabric is patterned with colorful designs.

2024 marks the 50th anniversary of the Expanded Program on Immunization (EPI), a system that works to ensure successful supply and delivery of critical vaccines to each child.

The impact of the EPI over the decades has been far-reaching. When we invest in immunization, we invest in a system: in health workers, supply chains, and a platform for simultaneously delivering numerous diarrhea prevention and treatment services.

Strong immunization systems are just as relevant today as we face emergent threats to child health, including conflict, migration, and climate change. “Zero-dose children” who miss out on vaccines are often those experiencing the worst impacts of these threats and could benefit from all that immunization systems have to offer.

Use the resources below to help us advocate for continued investment in strong immunization systems to defeat infectious diseases like diarrhea and blaze a trail for child health.

Immunization as an entry point

Immunization is an opportunity to provide other health services

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Graphic with a blue background depicting a black faucet and a syringe below it. The text in the middle reads "WASH and vaccines: Better together." The logo at the bottom says "DEFEATDD.
Graphic: WASH and immunizations
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Illustration of an adult with a baby on their lap, interacting with another adult in a white outfit, sitting in a dimly lit room.
Video: Rotavirus vaccines and WASH
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A health worker in a blue sweater sits on a bench explaining health information to a woman holding a baby wrapped in a blanket. They are in a clinic with informational posters on the wall behind them.
Blog: Strong health systems
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