How do vaccines work to protect us? What are the different ways for developing vaccines and how do we know they are safe?

WHO's Dr Katherine O’ Brien explains. 

This is a video in the series 'Science in 5 on COVID-19', in which WHO experts answer questions on COVID-19 - in 5 minutes! 

Published 11 December 2020.

World Health Organization
Beginner
6 minutes
English