Persistence of Antibodies at 3, 4 and 6 Years of Age After Vaccination With Meningococcal, Pneumococcal and Hib Vaccines

Inclusion Criteria: * 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. * A male or female between, and including, 36 and 40 months of age at the time of Visit 1; between, and including, 48 and 52 months of age at the time of Visit 2; and between, and including, 72 and 76 months of age at the time of Visit 3. * 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. * Subjects who previously participated in the primary and booster studies, who received a full vaccination course with the vaccines corresponding to their group during the primary and booster studies and who were part, in the booster study, of the blood sampling subset. Exclusion Criteria: * Use of any investigational or non-registered product (drug or vaccine) within 30 days preceding the first blood sampling. * Chronic administration (defined as more than 14 days) of immunosuppressants or other immune-modifying drugs within six months prior to the first vaccine dose. * Administration of any additional meningococcal serogroup C, Hib, hepatitis B and pneumococcal vaccine since the end of the booster study * History of meningococcal serogroup C, Haemophilus influenzae type b, hepatitis B and invasive pneumococcal diseases since the end of booster study. * Any confirmed or sus…