'Pandemic' Asks: Is A Disease That Will Kill Tens Of Millions Coming? (Fresh Air)

As public health officials struggle to contain the Zika virus, science writer Sonia Shah tells Fresh Air's Dave Davies that epidemiologists are bracing themselves for what has been called the next "Big One" — a disease that could kill tens of millions of people in the coming years.
Interview:
http://www.npr.org/sections/health-shots/2016/02/22/467637849/pandemic-asks-is-a-disease-that-will-kill-tens-of-millions-coming