Videos are listed by week.
Johnson gives us a tour of his 2006 book, The Ghost Map, telling the story of a cholera outbreak in 1854 London, and the famous map that physician John Snow made of the disease's path.
Rosling's Trendalyzer software (recently acquired by Google) turns complex global trends into lively animations, making decades of data pop.
In 2007, as the world worried about a possible avian flu epidemic, Laurie Garrett, author of "The Coming Plague," gave this powerful talk to a small TED University audience. Her insights from past pandemics are suddenly more relevant than ever.
Nicholas Christakis reveals that social networks can be used to detect epidemics earlier than ever, from the spread of innovative ideas to risky behaviors to viruses (like H1N1).
As the Assistant Director-General of the World Health Organization’s Polio and Emergencies Cluster, Bruce Aylward works to ensure that polio stays under control and that the world is prepared to respond to health crises.