Abstract
Streptococcus pneumoniae and Neisseria meningitidis cause invasive disease in children aged <2 years. While individual conjugate vaccines are available to protect this age group against these pathogens, availability of a vaccine combining these antigens into a single injection is desirable. This study randomized 467 healthy infants to receive 4 doses of combination 9-valent pneumococcal and meningococcal serogroup C conjugate vaccine (9vPnC-MnCC) or 9-valent pneumococcal conjugate vaccine (9vPnC). Percentages of subjects achieving immunoglobulin G (IgG) antibody concentrations ≥0.35 μg/mL and geometric mean IgG concentrations for each pneumococcal serotype in the 9vPnC-MnCC group were noninferior compared to the 9vPnC group. Both vaccines were well-tolerated.
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