Use of Quadrivalent Meningococcal Conjugate Vaccine (MenACWY-D) Among Children Aged 9 Through 23 Months at Increased Risk for Invasive Meningococcal Disease

In April 2011, the Food and Drug Administration approved the use of a quadrivalent meningococcal conjugate vaccine (MenACWY-D) (Menactra, Sanofi Pasteur) as a 2-dose primary series among children aged 9 through 23 months (1). Vaccination with meningococcal polysaccharide vaccine (MPSV4) is not recommended for children aged <2 years because of low immunogenicity and short duration of protection in this age group (2).