World Immunization Week 2025

World Immunization Week promotes the protection offered by vaccines.

Frequently asked questions

When is World Immunization Week 2025?

World Immunization Week 2025 is on Thursday, 24 April 2025.

What day of the week is World Immunization Week 2025?

It falls on Thursday.

How is World Immunization Week calculated?

This observance runs for 7 days from its calculated start date each year.