World Immunization Week, celebrated in the last week of April, aims to highlight the collective action needed and to promote the use of vaccines to protect people of all ages against disease.

Through its convening power, WHO works with countries across the globe to raise awareness of the value of vaccines and immunization and ensures that governments obtain the necessary guidance and technical support to implement high quality immunization programmes.

The ultimate goal of World Immunization Week is for more people – and their communities – to be protected from vaccine-preventable diseases.

This year World Immunization Week will celebrate 50 years of the Essential Programme on Immunization (EPI).