In 1796, an unknown country doctor named Edward Jenner developed and administered the world's first vaccine-turning the tide in humanity's age-old war against disease. Award-winning author Albert Marrin explains the significance of "immortal" Jenner's gift to mankind as he narrates the epic story of smallpox, a disease so contagious and deadly it has dramatically influenced the course of history. From the mummified remains of its first known victim...