Safety of Hib-MenCY-TT Vaccine Versus Licensed Hib Conjugate Vaccine, Given at 2, 4, 6 and 12 to 15 Months of Age

Inclusion Criteria: Subjects for whom the investigator believes that parents/guardians can and will comply with the requirements of the protocol. A male or female between, and including, 6 and 12 weeks of age at the time of the first vaccination. 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. Born after 36 weeks gestation. Infants who have not received a previous dose of hepatitis B vaccine or those who have received only 1 dose of hepatitis B vaccine administered at least 30 days prior to enrolment. Infants may have received a birth dose of Bacillus Calmette-Guérin (BCG) vaccine. Exclusion criteria: Use of any investigational or non-registered product (drug or vaccine) other than the study vaccine(s) within 30 days preceding the first dose of study vaccine, or planned use during the study period. Chronic administration (defined as more than 14 days) of immunosuppressants or other immune-modifying drugs since birth. Planned administration/ administration of a vaccine not foreseen by the study protocol within 30 days of the first dose of study vaccine(s). Previous vaccination against Neisseria meningitidis, Haemophilus influenzae type b, diphtheria, tetanus, pertussis, and/or poliovirus; more than one previous dose of hepatitis B vaccine. In country(ies) where Prevnar will be provided by GSK Biologicals, previous vaccination with Prevnar. History of Neisseria meningitidis, Haemophilus influenzae type b, diphtheria, tetanus, pertussis, hepatitis B, and/or poliovirus 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 vaccines, including dry natural latex rubber. Major congenital defects or serious chronic illness. History of any neurologic disorders or seizures. Acute disease at time of enrollment. Administration of immunoglobulins and/or any blood products since birth or planned administration during the study period. Concurrent participation 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 (pharmaceutical product or device).