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COVID-19 Vaccine Data

COVID-19 vaccination coverage in Iowa continues to increase with wide-spread vaccine availability and availability of vaccine for additional age groups. The COVID-19 vaccination coverage measures include the number of individuals fully vaccinated and number of fully vaccinated individuals that have received a booster dose (full definitions included below). These data can identify trends and patterns in immunization coverage and in different geographic areas.

Measure Description:
COVID-19 Vaccine Series Initiated and Fully Vaccinated are distinct and non-overlapping categories, with the following measure definitions:

  • Fully Vaccinated: Number of individuals that have received all of the required doses of the primary COVID-19 vaccine series (1, 2, or 3 doses).
  • Vaccine Series Initiated: Number of individuals that have received at least one dose of the COVID-19 vaccine series, but have not completed the series. This category excludes individuals that are fully vaccinated.

Measure Calculations:

  • Rate of Immunization: The # of Immunized Patients divided by the Census Population Estimate.
  • # of Immunized Patients: The Number of Immunized Patients that meet the selected Vaccine Status (Fully Vaccinated or Vaccine Series Initiated).
  • Census Population Estimate: The Census population estimate.
  • Number of Booster Doses: Number of fully vaccinated individuals that received an additional dose of a COVID-19 vaccine. This measure is the second dose for individuals with a 1-dose primary vaccine series or the third dose for individuals with a 2-dose primary vaccine series. This measure does not distinguish if the recipient is immunocompromised and received an additional dose (3rd dose) or booster.
  • Number of Second Booster Doses: Number of fully vaccinated individuals that received a second additional dose of a COVID-19 vaccine. This measure is the third dose for individuals with a 1-dose primary vaccine series or the fourth/fifth dose for individuals with a 2-dose primary vaccine series. The fifth dose is included to capture an additional dose for  immunocompromised individuals.

Data Notes:

  • Iowa healthcare providers administering COVID-19 vaccines are required to enroll in the Iowa Immunization Registry Information System (IRIS) and report COVID-19 doses administered to IRIS within 24 hours as part of the CDC COVID-19 Vaccination Program Provider Agreement.
  • The Iowa Immunization Program uses data reported to IRIS to track and monitor COVID-19 vaccine administration.
  • The COVID-19 vaccine data will be updated monthly.
  • IRIS receives vaccine administered information on an ongoing basis. Vaccine administration data may change as data is continuously reported to IRIS.
  • An individual must be fully vaccinated to receive a booster or second booster dose.
  • Booster doses do not impact the number or percent of the population fully vaccinated. Fully vaccinated includes individuals with a complete one dose or two dose primary series.
  • County indicates the vaccine recipient's county of residence.

Data Limitations:

  • The data available on the Iowa Public Health Tracking Portal may be different from data on the CDC COVID-19 Data Tracker. The CDC data includes vaccine administration data from all sources, including IRIS, other state immunization registries, and federal entities, such as Bureau of Prisons, Veterans Health Administration, Department of Defense, and Federal Long-Term Care program. These doses may not have been reported to IRIS. The data available in Portal is from IRIS only, which means that it does not necessarily include doses administered out of state or by federal entities.
  • IRIS does not capture information related to risk factors such as underlying health conditions resulting in weakened immune systems.
  • The booster dose categories do not distinguish if the recipient received an additional dose as part of the primary series due to being moderately or severely  immunocompromised or as a booster dose. The booster dose data is indicated by the dose number and vaccine manufacturer reported on the patient’s record in IRIS.
  • Booster dose rates are not calculated since not all age groups are eligible for a booster.

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.