Epidemiology Counts – Episode 2 “Community Immunity”

In the second episode, Matt Fox, Justin Lessler and Jennifer Ahern discuss the concept of herd immunity or community immunity. What is it? What has it accomplished? How do we know it works? What happens when we lose it? Interviews with Walter Orenstein, Elizabeth Halloran and Saad Omer, enrich the discussion by bringing historical, technical and social perspectives to understanding of this important phenomenon.