With a New Introduction by Phillip K. Peterson, M.D., author of Microbes: The Life-Changing Story of Germs For more than 3000 years, hundreds of millions of people have died or been left permanently scarred or blind by the relentless, incurable disease called smallpox. In 1967, Dr. D.A. Henderson became director of a worldwide campaign to eliminate this disease from the face of the earth. This spellbinding book is Dr. Henderson's personal story of how he led the World Health Organization's campaign to eradicate smallpox-the only disease in history to have been deliberately eliminated. Some have called this feat "the greatest scientific and humanitarian achievement of the past century." This latest edition features a new introduction by Phillip K. Peterson, M.D., in which the infectious diseases expert contends that Dr. Henderson's campaign against smallpox may provide insights towards the fight against COVID-19 and future global pandemics. In a lively, engrossing narrative, Dr. Henderson makes it clear that the gargantuan international effort involved more than straightforward mass vaccination. He and his staff had to cope with civil wars, floods, impassable roads, and refugees as well as formidable bureaucratic and cultural obstacles, shortages of local health personnel and meager budgets. Countries across the world joined in the effort; the United States and the Soviet Union worked together through the darkest cold war days; and professionals from more than 70 nations served as WHO field staff. On October 26, 1976, the last case of smallpox occurred. The disease that annually had killed two million people or more had been vanquished-and in just over ten years. The story did not end there. Dr. Henderson recounts in vivid detail the continuing struggle over whether to destroy the remaining virus in the two laboratories still that held it. Then came the startling discovery that the Soviet Union had been experimenting with smallpox virus as a biological weapon and producing it in large quantities. The threat of its possible use by a rogue nation or a terrorist has had to be taken seriously and Dr. Henderson has been a central figure in plans for coping with it. New methods for mass smallpox vaccination were so successful that he sought to expand the program of smallpox immunization to include polio, measles, whooping cough, diphtheria, and tetanus vaccines. That program now reaches more than four out of five children in the world and is eradicating poliomyelitis. This unique book is to be treasured-a personal and true story that proves that through cooperation and perseverance the most daunting of obstacles can be overcome.