Safety Study of GSK Biologicals' DTPa-IPV/Hib (Infanrix™-IPV/Hib)

Inclusion Criteria: * A male or female infant between, and including, 60 and 90 days of age at the time of the first study visit. * Born after a gestation period of 36 to 42 weeks inclusive. * Subjects who the investigator believes that their parents/guardians can and will comply with the requirements of the protocol should be enrolled in the study. * Written informed consent obtained from the parent or guardian of the subject. * Healthy subjects as established by medical history and clinical examination before entering into the study. Exclusion Criteria: * Use of any investigational or non-registered product other than the study vaccine within 30 days preceding the first dose of study vaccine, or planned use during the study period. * Chronic administration of immunosuppressants or other immune-modifying drugs since birth. * Administration of immunoglobulins and/or any blood products since birth or planned administration during the study period. * Administration of a vaccine not foreseen by the study protocol within 30 days prior to vaccination, or planned administration during the study period, with the exception of hepatitis B vaccine. * Concurrently participating in another clinical study, at any time during the study period, in which the subject has been or will be exposed to an investigational or a non-investigational product. * Evidence of previous or intercurrent diphtheria, tetanus, pertussis, poliomyelitis and/or Hib disease. * Previous vaccination against diphtheria, tetanus, pertussis, poliovirus and/or Haemophilus influenzae type b diseases. * History of seizures or progressive neurological disease. * Any confirmed or suspected immunosuppressive or immunodeficient condition, based on medical history and physical examination. * History of allergic disease or reactions likely to be exacerbated by any component of the vaccine. * Major congenital defects or serious chronic illness. The following condition is temporary or self-limiting and a subject may be vaccinated once the condition has resolved and no other exclusion criteria are met: • Current febrile illness or axillary temperature \> 37.0 ºC or other moderate to severe illness within 24 hours of study vaccine administration.