Study of the Safety of Menactra® Vaccine When Administered With Other Pediatric Vaccines to Healthy Toddlers

Inclusion Criteria : * Healthy, as determined by medical history and physical examination * Aged 9 months (249 to 305 days) or 12 months (365 to 400 days) at the time of enrollment * The parent or legal guardian has signed and dated the Independent Ethics Committee (IEC)-/Institutional Review Board (IRB)-approved informed consent form. Exclusion Criteria : * Serious acute or chronic disease (e.g., cardiac, renal, metabolic, rheumatologic, psychiatric, hematologic, autoimmune disorders, diabetes, atopic conditions, congenital defects, convulsions, encephalopathy, blood dyscrasias, leukemia, lymphomas of any type, or other malignant neoplasms affecting the bone marrow or lymphatic system, acute untreated tuberculosis) that could interfere with trial conduct or completion. * Known or suspected impairment of immunologic function. * Acute medical illness within the last 72 hours or a temperature ≥ 100.4ºF (≥ 38.0ºC) at the time of enrollment. * History of documented invasive meningococcal disease or previous meningococcal vaccination. * Has received the fourth dose of Prevnar, or the first dose of measles-mumps-rubella (MMR), varicella, or hepatitis A (HepA) vaccine. * Known human immunodeficiency virus (HIV), hepatitis B, or hepatitis C seropositivity as reported by the parent or legal guardian. * Received either immune globulin or other blood products within the last 3 months. * Suspected or known hypersensitivity to any of the vaccine components. * Thrombocytopenia or a blee…