The Advisory Committee on Immunization Practices (ACIP) recommends that children be vaccinated against 14 potentially serious illnesses during the first 24 months of life (1). CDC used data from the National Immunization Survey-Child (NIS-Child) to assess vaccination coverage with the recommended number of doses of each vaccine at the national, state, territorial, and selected local levels* among children born in 2015 and 2016. Coverage by age 24 months was at least 90% nationally for 653 doses of poliovirus vaccine, 651 dose of measles, mumps, and rubella vaccine (MMR), 653 doses of hepatitis B vaccine (HepB), and 651 dose of varicella vaccine, although MMR coverage was <90% in 20 states. Children were least likely to be up to date by ...