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Learn actively by finding out how vaccines work, how vaccines are made, how to visualize risk, and more. Click through these activities to explore the past, present, and future of vaccination and infectious disease.

  • Herd Immunity

    See how high vaccination rates protect the unvaccinated.

  • History of the Immunization Schedule

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

  • How Vaccines Are Made

    See the steps involved in manufacturing vaccines.

  • How Vaccines Work

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

  • Koch’s Postulates

    Learn how scientists identify the cause of an infectious disease.

  • Pioneer Breakthroughs

    Match the scientist to the disease he helped prevent.

  • The Scientific Method

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

  • Types of Vaccines

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

  • Understanding Risk

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

  • The College of Physicians of Philadelphia The World Health Organization Vaccine Safety Net Member
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