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.

Under-immunized children are generally underserved

Under-immunized children are generally underserved

Immunization as an entry point

Immunization as an entry point

Stemming the tide of drug resistance

Stemming the tide of drug resistance

Rotavirus vaccine's reach

Rotavirus vaccine's reach