Vincent and Dick explain virus classification, and revisit the 1976 swine flu immunization campaign and Guillain-Barré syndrome.

Links for this episode: * International Committee on the Taxonomy of Viruses (ICTV) * CBS 60 Minutes on 1976 swine flu vaccine (thanks Gus and Swiss compass!) * Vaccines and Guillain-Barré * NINDS Guillain-Barré Information * Reflections on the 1976 swine flu vaccination program * Swine influenza outbreak at Fort Dix, 1976

Weekly Science Picks Dick Five Kingdoms: An Illustrated Guide to the Phyla of Life on Earth by Lynn Margulis and Karlene V. Schwartz
Vincent A Genetic Switch by Mark Ptashne