05/10/2014 - This hour we explore perhaps the most iconic Patient Zero of all time: Typhoid Mary; dive into the molecular detective story to pinpoint the beginning of the AIDS epidemic; ask whether you can trace the spread of an idea and in the end, we find ourselves faced with a choice between competing claims about the origin of the high five.
http://www.radiolab.org/search/?q=patient+zero#q=patient%20zero
