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THE CORRECT ANSWER: Edward Jenner

Edward Jenner is a pioneering British physician in the history of medicine. In 1796, observing that farmers in contact with cowpox seemed immune to human smallpox, he attempted a daring experiment. He inoculates a young boy with pus from a vacciola pusula and subsequently exposes him to the smallpox virus. The child never develops the dreaded disease. This fundamental discovery gave rise to the modern concept of vaccination, a term directly derived from the Latin word meaning cow. Jenner's method quickly spread around the world, gradually replacing the older and risky practice of variolization. Thanks to its pioneering work and the global health campaigns that followed, smallpox was definitively eradicated from the planet by the World Health Organization nearly two centuries later.