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Joseph Lister (born April 5, 1827, Upton, Essex, England—died February 10, 1912, Walmer, Kent) was a British surgeon and medical scientist who was the founder of antiseptic medicine and a pioneer in preventive medicine. While his method, based on the use of antiseptics, is no longer employed, his principle—that bacteria must never gain entry into an operation wound—remains the basis of surgery to this day. He was made a baronet in 1883 and raised to...