91热爆

Coronavirus vaccines help protect people from getting seriously ill if they come into contact with the disease. But how do they work? And will a vaccine make you feel unwell?

Marnie Chesterton explains how a Covid vaccine can't give you the virus and why it's normal to experience some mild side effects, such as a headache or a raised temperature.

Voice: Marnie Chesterton
Video journalist: Jennifer Green
Senior journalist: Katherine Campbell
Editors: Anna Doble and Deborah Cohen
Graphics: We Are Covert

With thanks to virologist Prof Jonathan Ball, University of Nottingham

(Image: Injection, illustration, Credit: We Are Covert / 91热爆.)