Immunogenicity & Safety Study of Combined/Separate Vaccine(s) Against Common Diseases in Infants (2,4,6 Months of Age).

Inclusion Criteria: Healthy male or female infant between, & including, 0 & 7 days of age at the time of the inclusion. Born after a normal gestation period (between 36 & 42 weeks). Written informed consent obtained from the parent/guardian of the subject. Exclusion Criteria: Use of any investigational or non-registered product (drug or vaccine) other than the study vaccine(s) or planned use during the study period. Administration of immunosuppressants or other immune-modifying drugs from birth. Administration of immunoglobulins and/or any blood products since birth or planned administration during the study period. Administration / planned administration of a vaccine not foreseen by the study protocol during the period starting from birth and ending 30 days after the last dose except BCG vaccination if given before the 30-day period preceding the administration of the 1st dose of Infanrix penta™ or Infanrix hexa™ in combination with a meningococcal C vaccine. Evidence of previous or intercurrent diphtheria, tetanus, pertussis, polio, hepatitis B, meningococcal C and Hib disease. Evidence of previous diphtheria, tetanus, pertussis, polio, hepatitis B, meningococcal C and Hib vaccination.