Pneumococcal Vaccine Booster Study in Healthy Children 11-18 Months Old Previously Primed With the Same Vaccines

Inclusion Criteria: * Subjects who the investigator believes that their parents/guardians can and will comply with the requirements of the protocol. * A male or female between, and including, 11-18 months of age at the time of the booster vaccination. * A male or female who previously participated in study 107005 and received three doses of pneumococcal conjugate vaccine. * Written informed consent obtained from the parent or guardian of the subject. * Free of obvious health problems as established by medical history and clinical examination before entering into the study. Exclusion Criteria: * Concurrently participating in another clinical study, at any time during the study period (active phase and extended safety follow-up), in which the subject has been or will be exposed to an investigational or a non-investigational product. * Use of any investigational or non-registered product (drug or vaccine) other than the study vaccines within one month preceding the booster dose of study vaccines, or planned use during the entire study period * Chronic administration (defined as more than 14 days) of immunosuppressants or other immune-modifying drugs within 6 months prior to the booster dose of study vaccines. * Planned administration/administration of a vaccine not foreseen by the study protocol, during the period starting one month before the booster dose of study vaccines and up to the follow-up visit (one month after the booster dose of study vaccines). * Administration of…