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A blood donor found to carry hepatitis B surface antigen is

  • A.asked to donate only plasma in future
  • B.unaffected
  • C.permanently deferred from donating
  • D.allowed to donate after a week of rest

Answer: C

Correct answer: permanently deferred from donating

Surface antigen indicates active infection, so the blood is infectious and the donor is deferred permanently. The finding is also a clinical result: the donor is informed, investigated and referred for assessment, since many are unaware they are infected.

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