Welcome to a whole new Twitter handle – @Vaccines. Every week, a vaccine champion will curate @Vaccines – tweeting thoughts, stories and information linked to how vaccines work.

To help keep track of their contributions to the vaccine conversation, we’ll be gathering their top moments and commentaries here on Vaccines Work. If you know a vaccine champion who’d like to share their experiences @Vaccines, drop us a line at socialmedia@gavi.org

This week, we have Pascal Barollier and Flavia Bustreo taking the reins for World Immunisation Week. Stay tuned!

A lot of effort goes in to making vaccines work. Let’s see some more of it! Photo: Gavi/Evelyn Hockstein