Pandemic: Tracking Contagions, from Cholera to Ebola and Beyond

Scientists agree that a pathogen is likely to cause a global pandemic in the near future. But which one? And how?

Over the past fifty years, more than three hundred infectious diseases have either newly emerged or reemerged, appearing in territories where they’ve never been seen before. Ninety percent of epidemiologists expect that one of them will cause a deadly pandemic sometime in the next two generations. It could be Ebola, avian flu, a drug-resistant superbug, or something complete…