Primary & Booster Immunogenicity Study of GSK Biologicals' Hib-MenC Versus a Licensed Men-C Vaccine

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