NCIt definition : An inactivated virus vaccine that provides active immunization against hepatitis A
virus (HAV). Immunization with hepatitis A vaccine induces the formation of anti-HAV
antibodies which provide protection against hepatitis A infection.;
Alternative definition : NCI-GLOSS: 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.;