Vaccines keep millions of people healthy each year by preparing the body to fight illness. Learn how vaccines help and get answers to your biggest questions. Back to Articles Related Articles Common Questions About Immunizations Immunizations have protected millions of children from potentially deadly diseases. Learn about immunizations and find out exactly what they do - and what they don't. Read More Your Child's Immunizations Immunizations protect kids from many dangerous diseases. Find out what vaccines your child needs to grow up healthy. Read More Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2021 KidsHealth®. All rights reserved. Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.