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NCI Dictionary of Cancer Terms

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NCI Dictionary of Cancer Terms



hepatitis A vaccine  listen  (HEH-puh-TY-tis ... vak-SEEN)

  A vaccine used to prevent infection with the hepatitis A virus, which causes a serious liver disease. The vaccine is made of a weakened form of the virus that cannot cause disease but causes the body’s immune system to make antibodies that destroy the hepatitis A virus.