A Study to Assess the Antibody Response of Healthy Chinese Children Who Have Been Vaccinated Previously With 4-doses of Prevenar (a Pneumococcal Vaccine) as Babies and Toddlers

Inclusion Criteria: * Male or female subjects who participated in and completed Wyeth study 0887X 101518. * Healthy subject as determined by medical history, physical examination, and judgment of the investigator. Exclusion Criteria: * Vaccination with any licensed or investigational pneumococcal vaccine since completion of Wyeth study 0887X 101518. * History of culture proven invasive disease caused by S pneumoniae since the completion of Wyeth study 0887X 101518. * Known or suspected immune deficiency or suppression since participation in Wyeth study 0887X 101518.