The document discusses the history of medical tourism. It mentions that medical tourism can be traced back thousands of years to ancient civilizations like Sumeria, Greece, Rome, Japan, India and others who established early healing centers around mineral springs and developed therapies. It then outlines the rise of medical tourism in Asia in recent decades as countries like Thailand, India, Malaysia, Singapore capitalized on the industry after the Asian financial crisis to boost their economies. The region is now projected to generate over $4 billion annually from over 1.3 million medical tourists by 2012.