![](https://assets.weforum.org/article/image/Ef67musqevnNCT7zEs4-43T4tlnTBtfhAYvTmHvONtk.jpg)
Immunization: How it started, how it's going – what we’ve achieved through 50 years of vaccination programmes
Vaccine programmes save millions of lives each year, but conflict, economic downturns and vaccine hesitancy mean progress on immunisation has slipped.