This film explains how vaccines protect not only individuals, but entire populations through herd immunity. A historical example is the eradication of smallpox. This is part two of a three-part film series on vaccines.

Vaccines can help the body attack its own infected cells in the fight against cancer. One example is the work of 2018 Nobel Laureates Tasuku Honjo and James P. Allison. Find out more in this Mini Lecture. This is part three of a three-part Mini Lecture series on vaccines.