Find out what vaccines are, how they were invented and how they are developed today

Sarah Ridley has an enduring interest in history, the natural world and many other topics, which has made her work as an editor and writer of children's information books endlessly fascinating. Some of her books have been shortlisted or longlisted for information book awards, including Dear Jelly: Family Letters from the First World War and Suffragettes and the Fight for the Vote. Sarah lives in Colchester with her husband and her student daughter's guinea pigs.

• 1: Have you been vaccinated?
• 1: Germs and the immune system
• 1: Preventing infections
• 1: Smallpox: from variolation to vaccine
• 1: How do vaccines work?
• 1: How do you vaccinate the world?
• 1: Who discovered other important vaccines?
• 1: How do people create a new vaccine?
• 1: Anti-vaxxers and vaccine hesitancy
• 1: Covid-19 vaccines: a case study
• 1: What's the future for vaccinations?
• 1: Glossary
• 1: Index