A Study to Assess Antibody Persistence, Boostability & Safety in Previously Primed Subjects.

Inclusion criteria: • Healthy child 10 months that participated in the study DTPwHB/HibMenACTT001 (CPMS No. 759346/001), written informed consent obtained from the parents. Exclusion criteria: * Planned administration/ administration of a vaccine not foreseen by the study protocol during the period starting from 30 days before and ending 30 days after administration of study vaccines with the exception of oral polio vaccine (OPV). * Use of any investigational or non-registered product (drug or vaccine) other than the study vaccines within 30 days preceding the first dose of study vaccine, or planned use during study period. * Chronic administration (\> 14 days) of immunosuppressants or other immune-modifying drugs within 6 months prior to the first vaccine dose. * Previous booster vaccination against diphtheria, tetanus, pertussis, hepatitis B, serogroups A or C meningococcal disease and/or Hib since the last visit of study 759346/001. * History of/known exposure to diphtheria, tetanus, pertussis, hepatitis B, serogroups A or C meningococcal and/or Hib disease. * Any confirmed or suspected immunosuppressive or immunodeficient condition, including human immunodeficiency virus (HIV) infection.