Multicentre Study to Assess Persistence of Antibodies Against Hepatitis B & Immune Response to a Hepatitis B Challenge Dose in Healthy Children 4 to 6 Years Old Previously Vaccinated With 4 Doses of GSK Biologicals' DTPa-HBV-IPV/Hib Vaccine
Multicentre Study to Assess Persistence of Antibodies Against Hepatitis B & Immune Response to a Hepatitis B Challenge Dose in Healthy Children 4 to 6 Years Old Previously Vaccinated With 4 Doses of GSK Biologicals' DTPa-HBV-IPV/Hib Vaccine
Persistence of seroprotective antibody concentrations & immunological memory shown by the ability to mount a response to a challenge dose of HBV vaccine
Inclusion Criteria:
Kleve-Materborn, North Rhine-Westphalia 47533, Germany
Schoeneberg - Kuebelberg, Rhineland-Palatinate 66901, Germany