Understanding Risk

See how high vaccination rates protect the unvaccinated.

Find out how the U.S. immunization schedule has changed over time.

See the steps involved in manufacturing vaccines.

Learn about the human immune system’s response to vaccination. Then sequence the steps in the process on your own.

Learn how scientists identify the cause of an infectious disease.

Match the scientist to the disease he helped prevent.

You're in the middle of a disease outbreak. Apply the scientific method in an epidemiological setting to pinpoint the source of the illness.

Explore the features of attenuated, inactivated, subunit, and conjugate vaccines.

Visualize risks related to vaccination, disease, and other events.