4. Killer Contagion
During the last century, the world has known four major flu pandemics, and the World Health Organization says it is inevitable for humanity to face another killer virus soon.
A few years ago Swine Influenza cost trillions in preventive action. Avian Flu, or Foot-and-Mouth Disease, generated waves of panic and revealed how vulnerable our interconnected economies would be to a new, super resistant virus.