On this week's program, hosts Dr. Matthew Birnholz and Dr. Michael Greenberg welcome Jennifer Ackerman, author of Ah-Choo! The Uncommon Life of the Common Cold, to talk about the history of what we know about this most successful human pathogen.

Plus, the "nudge": Britain's new kinder, gentler approach to public health. Is nudging better than legislation to persuade people to engage in healthier behaviors? Or do we need more of a shove than a nudge? What should the government do to foster the public health?