- Aged 42 to 70 days at enrollment.
- Determined by medical history, physical examination, and clinical judgment to be
eligible for the study
- Weight of 3.5 kg or greater at the time of enrollment
- Previous vaccination with licensed or investigational pneumococcal vaccine.
- A previous anaphylactic reaction to any vaccine or vaccine-related component.
- Contraindication to vaccination with pneumococcal conjugate vaccine.
- Receipt of blood products or gamma-globulin since birth