Children: Immunization Data for 2 Year-Old

Child immunization data includes the percent of children that received the recommended doses of 4 DTaP, 3 Polio, 1 MMR, 3 Hib, 3 Hepatitis B, 1 Varicella and 4 PCV vaccines and the 4:3:1:3:3:1:4 series by age 24 months (2 years old). Iowa immunization data and rates are available in interactive maps and tables by single antigen and the completed series. These data provide immunization rates based upon a recommended vaccination series identified by the Advisory Committee on Immunization Practices (ACIP) and the Centers for Disease Control and Prevention (CDC). These data can identify trends and patterns in immunization coverage over time and in different geographic areas.

The Immunization Program uses data from the Immunization Registry Information System (IRIS) to calculate county and state immunization rates for 2-year-old children. The data includes patients served by both public and private health care providers with a record in IRIS that have a zip code and are an “active” patient within a health care provider organization. The Year selected in the visualization will include children turning 2 years-old in that year. For example, the 2019 results include children born between 01/01/2017 - 12/31/2017.

Measure Description:

  • Number of Immunized Patients: The number of Iowa residents recorded in IRIS that have received a dose or completed a specific vaccine series.
  • Patients in IRIS: The number of patient records in IRIS.
  • County 2 Year Old Census Population: The Number of 2 Year Olds in the County, based on census estimates.

Measure Calculations:

  • Rate of Immunization by Children in IRIS: The Number of Immunized Patients divided by the number of same-aged children and geographic area recorded in IRIS.
  • Rate of Immunization by County Population: The Number of Immunized Patients divided by the County 2 Year Old Population.
  • Census Population with IRIS Record: The percent of the Census population with patient record in IRIS, calculated as the number of patient records in IRIS divided by the county Census population. This measure demonstrates the completeness of IRIS data and representation of the county population in IRIS.

Data Note

  • Childhood immunization data from 2017-2019 were updated to include individuals with unknown genders in IRIS in June 2021 in order to represent all patients reported in IRIS. This method change may impact rates at the state and county level.

Use the tabs to see the different data visualizations.

Measures are defined above the visualization. Additional help can be found in the Help Section.

To download a data table click on the Title Text of the data table, click "Download" on the right below the data visualization, click "Crosstab" from the listed file formats, and click "Download". A '.csv' file will then download and can be opened in a text or spreadsheet application.