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.