The History of Vaccines is an educational site maintained by the College of Physicians of Philadelphia. Founded in 1787, the College currently runs the Mutter Museum, a museum of the history of medicine, and the Historical Medical Library. The History of Vaccines website includes an interactive timeline of vaccination history, online classroom activities, and a gallery of over 700 items related to vaccination. These three sections of the website include a number of helpful visuals (such as an interactive animation designed to help individuals visualize the concept of herd immunity) and intriguing primary documents. The Articles tab includes a variety of readings aimed at students, educators, and families alike. In the Educators area of the website, instructors will find four complete lesson plans (compatible with a variety of Science and Health Education standards) that utilize material from the website. Finally, readers will find recent news items related to vaccination in the Blog. Interested parties may also sign up to for an email list to learn about website updates.