The purpose of this study is to demonstrate the non-inferiority of the candidate Hib-MenC conjugate vaccine co-administered with Infanrix™-IPV versus a licensed meningococcal serogroup C vaccine co-administered with Pediacel™ when given according to a 2, 3, 4 month schedule and the immunogenicity of the Hib-MenC vaccine when given as a booster dose at 12-15 months of age.

This multicenter study is open with respect to the treatment allocation, but double-blind with respect to the Hib-MenC-TT lots (3 lots). The study will be conducted in two stages. Primary vaccination phase: 3 doses Hib-MenC-TT with Infanrix™-IPV or for the control group a licensed Men-C vaccine with Pediacel™ at 2, 3, 4 months of age; Booster/persistence phase: 1 dose Hib-MenC with Priorix™. 4 blood samples of 3.5ml (5ml for the UK subset) are collected (Study Months 0 & 3, prior to & 42 days after the booster).

Inclusion criteria:

• Healthy male or female, between, and including, 6 and 12 weeks of age.
• Born after a gestation period between 36 and 42 weeks
• Vaccination with hepatitis B at birth and at 6 to 12 weeks (concomitantly with the first study vaccine), accepted although not mandatory

Exclusion criteria:

• Planned administration/ administration of a vaccine not foreseen by the study protocol since birth, with the exception of Bacille Calmette Guerin (BCG) and hepatitis B vaccines.
• History of H. influenzae type b and /or meningococcal serogroup C disease.
• Previous vaccination against meningococcal serogroup C disease, diphtheria, tetanus, pertussis, polio or Hib disease.
• Any confirmed or suspected immunosuppressive or immunodeficient condition, including human immunodeficiency virus (HIV) infection
• A family history of congenital or hereditary immunodeficiency
• History of any neurologic disorders or seizures
• History of allergic disease or reactions likely to be exacerbated by any component of the vaccine

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