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Discussion

Hepatitis B immune globulin differs from the vaccine in that it provides

  • A.immediate passive protection that is short-lived
  • B.lifelong active immunity after a single dose
  • C.protection only against hepatitis A as well
  • D.no protection unless given before exposure

Answer: A

Ready-made antibody acts at once and is used after a needlestick or for a newborn of an infected mother, usually together with the first dose of vaccine. The protection wanes within months, whereas the vaccine builds lasting immunity.

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