Engerix™-B Kinder

A Study to Evaluate Persistence of Hepatitis B Antibodies, Immunogenicity and Safety of Engerix™-B Kinder Challenge Dose, in Adolescents Vaccinated With Four Doses of Infanrix™ Hexa During Infancy

Persistence of Immunity Against Hepatitis B in 12-13 Year Old Adolescents After Infant Hepatitis B Vaccination

Evaluation of the Long-term Persistence of Immunity to Hepatitis B, in Adolescents Vaccinated in Infancy With Engerix™-B Kinder

Long-term Persistence of Immunity Against Hepatitis B in 7-8 Years Old Children After Hepatitis B Vaccination.

Hepatitis B Antibody Persistence and Immune Response to Hepatitis B Vaccine Challenge in Previously Vaccinated Children

This Study Aims to Determine the Long-term Persistence of Antibodies Against Hepatitis B and to Evaluate the Immunogenicity and Safety of Hepatitis B Vaccine in Adolescents Vaccinated in Infancy With Infanrix™ Hexa

Persistence of Hepatitis B Antibody Levels & Immune Response to a Hepatitis B Vaccine Challenge