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The vaccine for smallpox was discovered by

  • A.Louis Pasteur
  • B.Alexander Fleming
  • C.Edward Jenner
  • D.Gregor Mendel

Answer: C

Correct answer: Edward Jenner

Edward Jenner introduced smallpox vaccination in 1796, having observed that milkmaids who had caught cowpox did not take smallpox. The word vaccine comes from vacca, a cow. Smallpox is the only human disease to have been eradicated.

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