Epidemics of the past Smallpox: 12,000 Years of Terror Epidemics of the Past: Smallpox: 12,000 Years of Terror Smallpox: 12,000 Years of Terror Smallpox: 12,000 Years of Terror Smallpox: 12,000 Years of Terror Smallpox: 12,000 years of terror Smallpox: 12,000 Years of Terror Epidemics of the past Smallpox: 12,000 years of terror