2018 National Immunization Survey (NIS) - Vaccination Coverage Levels
Table of Contents
- National Immunization Survey-Child (NIS-Child) 2018, Texas
Immunization coverage among Texas children at 24 months of age
The NIS-Child is a national survey conducted annually by the Centers for Disease Control and Prevention to assess immunization levels among pre-school children (at 2 years of age for most immunizations). The NIS is the only population-based survey to provide national, state, local area, and territorial estimates of vaccination coverage among children in the United States. This study collects data by administering telephone surveys to randomly selected households. To ensure the accuracy and precision of the vaccination coverage estimates, immunization data for surveyed children are also collected through a mail survey of their pediatricians, family physicians, and other health care providers. The parents and guardians of eligible children are asked during the telephone interview for consent to contact the children’s vaccination providers. Types of immunizations, dates of administration, and additional data about facility characteristics are requested from immunization providers that are identified during the telephone survey of households. Data are weighted to be representative of the population of children 24 months of age, and are adjusted for multiple phone lines, mixed telephone lines (i.e., landline and cellular), household nonresponse, and the exclusion of phoneless households.
The NIS provides national and state estimates of vaccination coverage, including new vaccines as they are licensed and recommended for use. The survey also tracks progress towards Healthy People 2020 goals.
CDC changed the way that NIS results are reported starting in 2019. In the past, results were reported for children 19-35 months of age at the time of the survey. Now, results for most vaccines are reported at 24 months of age, by birth year (i.e. coverage is reported among 2-year-olds born in 2015). Certain vaccines (Hepatitis B birth dose and Rotavirus) are reported at younger ages because they are completed before 24 months.
The survey assessed the immunization histories of over 25,000 children in the United States born in 2015 and 2016. Coverage estimates for children born in 2016 are preliminary, because some had not yet reached 24 months of age at the time of the most recent survey.
The NIS collects information on the following vaccine series to assess the percent of children that are up to date with routinely recommended vaccinations:
- Diphtheria and tetanus toxoids and acellular pertussis vaccine (DTaP/DT/DTP)
- Poliovirus vaccine (Polio)
- Measles or Measles-Mumps-Rubella vaccine (MMR)
- Haemophilus influenzae type b vaccine (Hib)
- Hepatitis B vaccine (HepB)
- Varicella vaccine (Var)
- Pneumococcal conjugate vaccine (PCV)
- Hepatitis A vaccine (HepA)
- Rotavirus vaccine
- Influenza (Flu)
- 4:3:1:3*:3:1:4 series
- ≥4 doses of DTaP
- ≥3 doses of Polio
- ≥1 dose of MMR
- ≥3 doses of Hib (*3 or 4 doses depending on vaccine type)
- ≥3 doses of HepB
- ≥1 dose of Var
- ≥4 doses of PCV
The 4:3:1:3*:3:1:4 series reflects vaccine coverage for seven key vaccines combined. It measures overall compliance with the recommendations of the Advisory Committee on Immunization Practices (ACIP) for young children.
NIS Coverage Estimates
For access to the full dataset, please see the CDC Data and Documentation for NIS Surveys page.