A decrease in the specificity of the anti-HBs enzyme-linked immunosorbent assay (ELISA) had been observed in some studies for low levels of anti-HBs antibodies (10-100 mIU/mL). All the available blood samples initially tested with ELISA were re-tested using the Chemi-Luminescence Immuno Assay (CLIA) approved by the US Food and Drug Administration (FDA). The table shows updated results following partial or complete retesting/reanalysis.

Analysis was performed on According-to-Protocol (ATP) cohort for immunogenicity which included all evaluable subjects who had received a challenge dose of Engerix-B Kinder vaccine and for whom immunogenicity data were available at the post- Engerix-B Kinder challenge time point.

Antibody concentrations are expressed as Geometric mean antibody concentrations (GMCs) in mIU/mL.

A decrease in the specificity of the anti-HBs ELISA had been observed in some studies for low levels of anti-HBs antibodies (10-100 mIU/mL). All the available blood samples initially tested with ELISA were re-tested using the Chemi-Luminescence Immuno Assay (CLIA) approved by the US Food and Drug Administration (FDA). The table shows updated results following partial or complete retesting/reanalysis.

Analysis was performed on According-to-Protocol (ATP) cohort for persistence which included all subjects previously primed and boosted with 4 doses of Infanrix hexa in the first 2 years of life; with no evidence of hepatitis B infection or disease and for whom serological results were available at the pre- Engerix-B Kinder challenge time point.

Anti-HBs antibody concentrations cut-off values assessed were ≥ 6.2 mIU/mL (previously 3.3 mIU/mL), ≥ 10 mIU/mL, ≥ 10 mIU/mL to <100 mIU/mL and ≥ 100 mIU/mL. A decrease in the specificity of the anti-HBs ELISA had been observed in some studies for low levels of anti-HBs antibodies (10-100 mIU/mL). All the available blood samples initially tested with ELISA were re-tested using the Chemi-Luminescence Immuno Assay (CLIA) approved by the US Food and Drug Administration (FDA). The table shows updated results following partial or complete retesting/reanalysis and the initial 3.3 mIU/mL seropositivity cut-off was revised into the new 6.2 mIU/mL cut-off.

Analysis was performed on According-to-Protocol (ATP) cohort for persistence which included all subjects previously primed and boosted with 4 doses of Infanrix hexa in the first 2 years of life; with no evidence of hepatitis B infection or disease and for whom serological results were available at the pre- Engerix-B Kinder challenge time point.

Anti-HBs antibody concentrations cut-off values assessed were ≥ 6.2 mIU/mL (previously 3.3 mIU/mL) and ≥ 10 mIU/mL. A decrease in the specificity of the anti-HBs ELISA had been observed in some studies for low levels of anti-HBs antibodies (10-100 mIU/mL). All the available blood samples initially tested with ELISA were re-tested using the Chemi-Luminescence Immuno Assay (CLIA) approved by the US Food and Drug Administration (FDA). The table shows updated results following partial or complete retesting/reanalysis and the initial 3.3 mIU/mL seropositivity cut-off was revised into the new 6.2 mIU/mL cut-off.

Analysis was performed on According-to-Protocol (ATP) cohort for immunogenicity which included all evaluable subjects who had received a challenge dose of Engerix-B Kinder vaccine and for whom immunogenicity data were available at the post- Engerix-B Kinder challenge time point.

Antibody concentrations are expressed as Geometric mean antibody concentrations (GMCs) in mIU/mL. A decrease in the specificity of the anti-HBs had been observed in some studies for low levels of antibody (10-100 mIU/mL). All the available blood samples initially tested with ELISA were re-tested using the Chemi-Luminescence Immuno Assay (CLIA) approved by the US Food and Drug Administration (FDA). The table shows updated results following partial or complete retesting/reanalysis.

Analysis was performed on According-to-Protocol (ATP) cohort for immunogenicity which included all evaluable subjects who had received a challenge dose of Engerix-B Kinder vaccine and for whom immunogenicity data were available at the post- Engerix-B Kinder challenge time point.

The anamnestic response is defined as an antibody concentration ≥ 10 mIU/mL at post Engerix-B Kinder challenge dose time point for initially seronegative subjects ,and as an antibody concentration at post Engerix-B Kinder challenge dose time point ≥ 4 fold the pre-vaccination antibody concentration for initially seropositive subjects. A seropositive/seronegative subject was defined as subject with HBs antibody concentration below/greater than or equal to the seropositivity cut-off of 6.2 mIU/mL. A decrease in the specificity of the anti-HBs ELISA had been observed in some studies for low levels of antibody (10-100 mIU/mL). All the available blood samples initially tested with ELISA were re-tested using the Chemi Luminescence Immuno Assay (CLIA) approved by the US Food and Drug Administration (FDA). The table shows updated results following partial or complete retesting/reanalysis and the initial 3.3 mIU/mL seropositivity cut-off was revised into the new 6.2 mIU/mL cut-off.

Analysis was performed on According-to-Protocol (ATP) cohort for immunogenicity which included all evaluable subjects who had received a challenge dose of Engerix-B Kinder vaccine and for whom immunogenicity data were available at the post- Engerix-B Kinder challenge time point.

Solicited local symptoms assessed were pain, redness and swelling. Any was occurrence of any local symptom regardless of their intensity grade. Grade 3 pain was considerable pain at rest that prevented normal everyday activities. Grade 3 redness and swelling was > 50 millimeter (mm).

Analysis was performed on Total Vaccinated cohort which included all subjects who received the challenge dose of Engerix-B Kinder vaccine .

Solicited general symptoms assessed were fatigue, gastrointestinal symptoms, headache and temeperature.

Any temperature was defined as axillary temperature ≥ 37.5 degree centigrade (°C), grade 3 temperature was axillary temperature > 39.0°C. For other symptoms, any was defined as occurrence of any general symptom regardless of intensity grade or relation to vaccination and grade 3 was defined as a general symptom that prevented normal activity. Related was a general symptom assessed by the investigator as causally related to the study vaccination.

Analysis was performed on Total Vaccinated cohort which included all subjects who received the challenge dose of Engerix-B Kinder vaccine.

Unsolicited AE covers any AE reported in addition to those solicited during the clinical study and any solicited symptom with onset outside the specified period of follow-up for solicited symptoms. Any was defined as occurrence of any unsolicited symptom regardless of intensity grade or relation to vaccination.

Analysis was performed on Total Vaccinated cohort which included all subjects who received the challenge dose of Engerix-B Kinder vaccine.

SAEs assessed include medical occurrences that result in death, are life threatening, require hospitalization or prolongation of hospitalization, result in disability/incapacity or are a congenital anomaly/birth defect in the offspring of a study subject. Any was defined as occurrence of any symptom regardless of intensity grade or relation to vaccination.

Analysis was performed on Total Vaccinated cohort which included all subjects who received the challenge dose of Engerix-B Kinder vaccine.