Immunogenicity and safety of a quadrivalent meningococcal conjugate vaccine administered concomitantly with measles, mumps, rubella, varicella vaccine in healthy toddlers

► We administered 2 doses of MenACWY-CRM at 7-9 and 12 months and MMRV at 12 months. ► MenACWY-CRM was well-tolerated and immunogenic when used concomitantly with MMRV. ► Safety and immunogenicity of MMRV was not impacted by concomitant MenACWY-CRM. ► Results support that 2-doses of MenACWY-CRM starting at 7 months are immunogenic.