The purpose of this study is to evaluate the immune response and reactogenicity of GSK Biologicals' DTPa-HBV-IPV combined pentavalent vaccine and Hib tetanus conjugate vaccine, administered concomitantly as a three-dose primary vaccination course.

Inclusion Criteria:

• A male or female infant between 6 and 8 weeks of age at the time of the first vaccination.
• Free of obvious health problems as established by medical history and clinical examination before entering into the study.
• Written informed consent obtained from the parents or guardians of the subject.
• Born after a normal gestation period (between 36 and 42 weeks).

Exclusion Criteria:

• Use of any investigational or non-registered drug or vaccine other than the study vaccine(s) during the study period or within 30 days preceding the first dose of study vaccine.
• Administration of chronic immunosuppressants or other immune-modifying drugs since birth or planned administration during the study.
• Planned administration/ administration of a vaccine not foreseen by the study protocol during the period starting from 30 days before each dose of vaccine(s) and ending 30 days after.
• Previous vaccination against diphtheria, tetanus, pertussis, polio or Haemophilus influenzae type b.
• History of, or intercurrent, diphtheria, tetanus, pertussis, hepatitis B, polio and/or Haemophilus influenzae type b.
• Any confirmed or suspected immunosuppressive or immunodeficient condition, including human immunodeficiency virus infection.
• Major congenital defects
• Serious chronic illness
• History of allergic disease or reactions likely to be exacerbated by any component of the vaccines.
• Administration of immunoglobulins and/or any blood products since birth or planned administration during the study period.
• Acute disease at the time of enrollment.

Patient-level data for this study will be made available through www.clinicalstudydatarequest.com following the timelines and process described on this site.