Immunity to hepatitis A and B persists for at least 15 years after immunisation of adolescents with a combined hepatitis A and B vaccine
Keywords: HAV; hepatitis A virus; HBV; hepatitis B virus; HBs; hepatitis B surface antigen; anti-HBs; antibodies to hepatitis B surface antigen; anti-HAV; antibodies to hepatitis A virus; ATP; according-to-protocol; CI; confidence interval; CLIA; chemiluminescence