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→Modern period
Another major breakthrough came with [[Edward Jenner]]'s ( 1749 – 1823) discovery that milkmaids developed an immunity to [[smallpox]], because they had earlier contacted cowpox,, mild disease of animals. This led to the invention of a smallpox vaccine, which Jenner first tested in May 14, 1796, by inoculating eight-year-old James Phipps, the son of his gardener.
Another major breakthrough came with [[Edward Jenner]]'s ( 1749 – 1823) discovery that milkmaids developed an immunity to [[smallpox]], because they had earlier contacted cowpox,, mild disease of animals. This led to the invention of a smallpox vaccine, which Jenner first tested in May 14, 1796, by inoculating eight-year-old James Phipps, the son of his gardener.
Other significant early pioneers were [[Alexander Fleming]], who discovered the value of [[penicillin]], and [[Florence Nightingale]], the founder of modern nursing.
Other significant early pioneers were Alexander Fleming, who discovered the value of [[penicillin]], and [[Florence Nightingale]], the founder of modern nursing.
====Bubonic plague====
====Bubonic plague====