Washington State immunization rates are available from multiple data sources.
- This one-page flyer (PDF) compares three main sources.
- The table at the bottom of this page has quick guidance on each available data source.
- For detailed information, please see Immunization Data – Technical Notes (PDF).
- Find some immunization data on the Health Care Authority dashboard.
Read on for links to data sources.
Available Data by Source
Report: Effects of the COVID-19 Pandemic on Vaccine Doses Administered and Routine Childhood Vaccination Coverage (June 2019 – December 2021)
Disruptions to schooling, childcare and in-person health care starting in March 2020 resulted in delays to routine well child visits. The Washington State Department of Health Office of Immunization explored vaccine doses administered, and coverage in children, for four age groups to describe the effects of these delays.
- COVID-19 Pandemic Impacts to Washington Childhood Immunization Rates (PDF) – May 2022
- Updated December 2022 vaccination coverage data for the Effects of the COVID-19 Pandemic on Routine Childhood Vaccination Coverage Rates (PDF)
Washington State Immunization Information System (IIS)
The IIS is a lifetime registry that tracks immunization records for people of all ages in Washington. Immunization rates for children, adolescents, and adults are available through the IIS. This data source is best used to calculate childhood immunization rates. The Department of Health publishes annual data for immunization coverage among toddlers, children, and adolescents by county and state.
Washington State School Immunization Data
Each fall, Washington schools must report immunization coverage for their student population to the Department of Health. Data tables, graphs and, maps are available for kindergartners, 6th graders, and all students in grades K through 12.
Washington Immunization Scorecard
The Scorecard provides a quick glance at Washington's immunization coverage. It is intended to inform health care providers, policy makers, partners and the public about our progress toward our immunization goals. The Scorecard features rates for key childhood, adolescent, and adult immunizations. Data come from school coverage reports, the National Immunization Survey, and the Behavioral Risk Factor Surveillance System.
The first Scorecard was released in April 2016 and contains data for 2014. Scorecards will be updated annually.
- 2018 Washington Immunization Scorecard (PDF) - posted March 2020
- 2017 Washington Immunization Scorecard (PDF) - posted February 2019
- 2016 Washington Immunization Scorecard (PDF) - posted January 2018
- 2015 Washington Immunization Scorecard (PDF) - posted January 2017
- 2014 Washington Immunization Scorecard (PDF) - posted April 2016
CDC – National Immunization Survey (NIS)
The Centers for Disease Control and Prevention (CDC) conducts an annual national telephone survey to assess immunization rates. Data are available for two year-olds and adolescents. This survey is the gold standard for immunization rates and can be used to compare immunization coverage by state and year. National NIS data are available here.
Washington State and CDC - Behavioral Risk Factor Surveillance System (BRFSS)
The BRFSS is an annual phone survey of health behaviors. BRFSS data are used to assess adult immunization coverage at the national, regional, state, and county levels.
The Department of Health collects and analyzes state and county level adult immunization coverage through BRFSS for pneumococcal and flu vaccines. Data usually have a one year lag period.
The CDC publishes BRFSS data including adult immunization rates for influenza, pneumococcal and tetanus vaccines by state, region, and for the US on its website.
Available data sets go back to 1997.
CDC – Adult vaccination coverage data
The CDC publishes annual adult vaccination coverage estimates at the local, state, regional, and national levels on their interactive AdultVaxView website.
CDC – Flu vaccination coverage data
The CDC publishes annual flu vaccination coverage at the national and state levels on their interactive FluVaxView website. Data are available for the last five flu seasons.
Quick Guide to Available Data
|Population||Data source(s)||Available breakdowns||Available years||Commonly used vaccines and vaccine series||Commonly used age groups|
|Toddlers and young children||NIS||nation, region, state||1995 - present||4:3:1:3:3:1:4 by vaccine and for the series||19-35 month-olds|
|IIS||state and county||2002 - present (more complete data for more recent years)||4:3:1:3:3:1:4 by vaccine and for the series||19-35 month-olds|
|HEDIS Combination 10||2 year-olds|
|School aged children||WA school data||state, regional service area (RSA), county, educational service district, school district, school||1998 - present||Immunizations required for entry to WA schools||Kindergartners|
|All students in K-12|
|Adolescents||NIS||nation, region, state||2006 - present||1:1:1 series||13-17 year-olds, HPV often stratified by sex|
|IIS||state and county by sex||2002 - present (more complete data for more recent years)||1:1:3 series|
|Adults||NIS||nation, region, state||2007||Pneumococcal
Everyone 18+ years-old
Everyone 65+ years-old
|BRFSS||BRFSS- CDC: nation and state||1984- present||Pneumococcal
|Everyone 65+ years-old|
|BRFSS- WA: state and county||1995 - 2006 data are posted on web; more recent data are available upon request|
|Everyone 18+ years-old|
|Healthcare workers||NHIS||nation||2+ years of data||Tetanus||N/A|
|CDC FluVaxView||nation, health care facility type||2009- present||Influenza||N/A|
|Pregnant women||CDC FluVaxView||nation and state||2009- present||Influenza||N/A|
If you are unable to find the data you need, please contact us at WAIISDataRequests@doh.wa.gov. If you would like to submit a data request, please fill out our data request form (Word). We accept special data requests from partners and the public but are temporarily unable to guarantee a turnaround time.