The invention of the smallpox vaccine is attributed to a specific historical figure.
The individual credited with inventing the first successful smallpox vaccine was Edward Jenner.
Edward Jenner, an English physician, observed that milkmaids who contracted cowpox, a milder disease, seemed immune to smallpox. In 1796, he conducted his famous experiment by inoculating a young boy, James Phipps, with material from a cowpox sore and later exposed the boy to smallpox. The boy did not develop smallpox, demonstrating the principle of vaccination.
Therefore, Edward Jenner is the correct answer for the invention of the smallpox vaccine.
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