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Subunit vaccines contain

  • A.attenuated bacteria
  • B.immunogenic component of the bacteria
  • C.inactivated bacteria 
  • D.inactivated toxin

Answer: B

Correct answer: immunogenic component of the bacteria

A subunit vaccine contains only the immunogenic part of the organism - a surface protein or a capsular polysaccharide - and none of the rest. Leaving out everything unnecessary means far fewer side effects; the hepatitis B and pneumococcal vaccines work this way.

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