Where's your next disease coming from? From anywhere in the world--from overflowing sewage in Cairo, from a war zone in Rwanda, from an energy-efficient office building in California, from a pig farm in China or North Carolina. "Preparedness demands understanding," writes Pulitzer-winning journalist Laurie Garrett, and in this precursor to Betrayal of Trust: The Collapse of Global Public Health, she shows a clear understanding of the patterns lying beneath the new diseases in the headlines (AIDS, Lyme) and the old ones resurgent (tuberculosis, cholera). As the human population explodes, ecologies collapse and simplify, and disease organisms move into the gaps. As globalization continues, diseases can move from one country to another as fast as an airplane can fly.