If someone received MenACWY at age 9 years, will two additional doses of MenACWY be needed?

Yes. Doses of any quadrivalent meningococcal vaccine (MenACWY) given before 10 years of age should not be counted as part of the series. If a child received a dose of either MPSV4 (Menomune, a meningococcal polysaccharide vaccine not available in the United States since 2017) or MenACWY before age 10 years, they should receive a dose of MenACWY at 11 or 12 years and a booster dose at age 16 years. A dose of MenACWY administered at age 10 may count as the first adolescent dose normally given at 11 or 12.