CDC Immunization Coverage 19 to 35 Months 2011 to 2014

The reduction in morbidity and mortality associated with vaccine-preventable diseases in the United States has been described as one of the 10 greatest public health achievements of the first decade of the 21st century. A recent analysis concluded that routine childhood vaccination will prevent 322 million cases of disease and about 732,000 early deaths among children born during 1994–2013, for a net societal cost savings of $1.38 trillion (2). The National Immunization Survey (NIS) has monitored vaccination coverage among U.S. children aged 19–35 months of ≥3 doses of poliovirus vaccine, ≥1 dose of measles, mumps, and rubella vaccine (MMR), ≥3 doses of hepatitis B vaccine (HepB), ≥1 dose of varicella vaccine, ≥4 doses of diphtheria, tetanus, and acellular pertussis vaccine (DTaP), the full series of Haemophilus influenzae type b (Hib) vaccine, hepatitis B (HepB) birth dose, ≥4 doses pneumococcal conjugate vaccine (PCV), ≥2 doses of HepA, the full series of rotavirus vaccine, and the combined vaccine series including DTaP, the full series of Hib, PCV, rotavirus vaccine, and the combined series. NIS employs a dual-frame landline and cell phone random-digit–dialing (RDD) design to identify households with children. Once households with age-eligible children are identified, a parent or guardian is interviewed and asked for consent to contact the child’s vaccination provider. If consent is obtained, the providers receive a mail survey requesting the child’s vaccination history, including dates of receipt of specific vaccine doses. This information is used to calculate comprehensive estimates of coverage (i.e., the percentage of children who are up-to-date as recommended by the Advisory Committee on Immunization Practices [ACIP]). Data are weighted to be representative of the population of U.S. children aged 19–35 months and are adjusted for multiple telephone lines, mixed telephone use (i.e., landline and cellular), household nonresponse, and the exclusion of households without telephones. Data is presented as point estimate (%) ± 95% confidence interval. Estimate=NA (Not Available) if the un-weighted sample size for the denominator was 0.588.