Avian Influenza poses a looming threat for human and animal health. The old paradigm was that the disease in waterfowl, poultry, pigs and man was caused by separate viruses that stayed within their own niche. Deadly outbreaks have shattered this view. This timely reference examines such sensitive issues as regulation of low pathogenic and high pathogenic AI, surveillance of waterfowl, live bird markets, and outbreak control in densely populated areas.