Pandemics do not occur randomly. From malaria and influenza to AIDS and SARS, the lethal microbes have come, in the first instance, from animals, especially wild animals. And we increasingly know which parts of the world pose the greatest risk for future incursions.

Seasonal flu is now a pandemic that lasts for years and years because you've got so many people that it's jumping back between northern and southern hemispheres and moving itself around the world. By the time it gets back to where it started, it's changed sufficiently so that people are no longer immune.

The world can now maintain an acute infection in a way that is unprecedented in the history of life on our planet.

Nathan Wolfe Quotes