Who was the first person Edward Jenner successfully vaccinated against smallpox using cowpox material?
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Edward Jenner tested his theory on James Phipps, the eight-year-old son of his gardener, in 1796. Jenner took pus from a cowpox lesion on a milkmaid's hand and inoculated the boy. After Phipps recovered from the mild cowpox fever, Jenner exposed him to actual smallpox multiple times, and Phipps never developed the disease. This bold experiment laid the foundation for modern vaccinology. Photo: Wikimedia Commons, CC BY 4.0.
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Source: Wikipedia (CC BY-SA)
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