The Big Picture with Kal Penn - Season 1 Episode 4

Kal Penn goes "viral" to uncover what causes and drives pandemics around the world, and what can make them even more dangerous than you think. Go to a Chinese animal market where one of the most infamous pandemics of our age started. Visit scientists on the front lines fighting the most dangerous creatures in the world, the mosquito. See how a top-secret lab is preparing us for the scariest "what if" situations of bioterrorism in the U.S.