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The last endemic case of smallpox occurred in

  • A.1980
  • B.1967
  • C.1990
  • D.1977

Answer: D

Correct answer: 1977

The last naturally acquired case was in Somalia in October 1977. That date matters because eradication is not declared on the last case but only after a long period of surveillance has failed to find another - which is why the confirmation date is later. A laboratory-acquired case occurred in Birmingham in 1978, but it was not endemic transmission.

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