Study of the Safety and Immune Response of a Meningococcal Vaccine Administered to Healthy Children

A Phase 2, Randomized, Single-blind, Controlled, Single-Center Study to Compare the Safety and Immunogenicity of One Dose of Chiron Meningococcal ACWY Conjugate Vaccine With One Dose of Licensed Meningococcal ACWY Polysaccharide Vaccine Administered to Healthy Children 2-10 Years of Age and an Open-label Study to Assess the Safety and Immunogenicity of One Dose of Chiron Meningococcal ACWY Conjugate Vaccine Administered to Healthy Toddlers 12-23 Months of Age

The purpose of this study is to evaluate the safety and immunogenicity of Novartis (formerly Chiron) Meningococcal ACWY Conjugate Vaccine administered to healthy children ages 1 - 10 years

Inclusion Criteria:

• Group 1: Healthy children 2-10 years of age;
• Group 2: Healthy toddlers 12-23 months of age; who are up to date with age appropriate immunizations for diphtheria, tetanus, pertussis, polio, hepatitis B, Hemophilus influenzae type b, and pneumococcus.

Exclusion Criteria:

• Group 1: Subjects with a previous or suspected disease caused by N. meningitidis; or previous immunization with a meningococcal vaccine or vaccine containing meningococcal antigen(s); Any serious acute, chronic or progressive disease.
• Group 2: Subjects with a previous or suspected disease caused by N. meningitidis or previous immunization with a meningococcal vaccine or vaccine containing meningococcal antigen(s); Any serious acute, chronic or progressive disease.