Immunizations: Influenza Vaccine Data

Influenza, also called the flu, affects people differently and can lead to serious complications or even death. The best way to protect yourself and your community from the flu is to get a vaccine every fall. Flu vaccines are safe and effective at protecting people against illness, hospitalization, and even death. The Wisconsin Department of Health Services reports on flu vaccinations for all persons at least 6 months old who have received at least one dose of flu vaccine during the season.

The flu season occurs in the fall and winter, although the exact dates and duration varies from year to year. Per guidance from the Centers for Disease Control and Prevention (CDC), individuals are recommended to receive an annual flu vaccine. Most individuals will need one dose of flu vaccine each season. Children 6 months to 8 years old who have received less than two flu vaccines in the past, or don’t know whether they received less than two vaccines in the past, should get two doses of vaccine this season.

Seasonal flu vaccination data for Wisconsin is based on information from the Wisconsin Immunization Registry (WIR), unless otherwise specified. WIR is an internet database that tracks vaccine records for Wisconsin children and adults. For more information on how to access your own vaccine record, visit the DHS WIR webpage.

Data is updated on a weekly basis during the flu season.

Flu vaccines for Wisconsin residents

 

Understanding our data: What does this chart mean?

This dashboard provides breakdowns of vaccines administered to Wisconsin residents by county, age, sex, race, and ethnicity. Data in the map represent the county where the person who was vaccinated lives, not where they received their vaccine.

Percentages represent the vaccine coverage of the selected geography or demographic group. This helps us understand how well communities are protected from flu.

We use Wisconsin Interactive Statistics on Health (WISH) query system totals to calculate vaccine coverage percentages. Because these are estimates, and not exact counts, it is possible for vaccination counts to exceed population estimates for some groups.

Please note: Demographic data such as sex, race, and ethnicity are not required to be reported in WIR. Therefore, this data may not be available for everyone who received a flu vaccine. As patient information is updated or completed in WIR, the number of vaccinations reported without demographic information may decrease.

About our data: How do we measure this?

Data source: The Wisconsin Immunization Registry (WIR)

Vaccination administration: The cumulative number of influenza vaccines administered.

Vaccine dose: One vaccine dose is one vaccine product (like a shot or a nasal spray).

Vaccination coverage: An estimated percentage of the whole population who have received a flu vaccine. This helps us understand how well communities are protected from flu. It also helps us see which areas and groups are less protected against flu.

Population estimates: Wisconsin Interactive Statistics on Health (WISH) query system totals.

Data shown are subject to change. Some examples of corrections or updates that affect an area’s coverage include:

  • Removing duplicates or merging and consolidation of records
  • Updating a patient's address to a different county or state

Seasonal trends of influenza vaccines for Wisconsin residents

 

Understanding our data: What does this chart mean?

This dashboard displays breakdowns of the cumulative count of vaccines administered to Wisconsin residents during the given flu season and the count of vaccines administered each month. Percentages represent the vaccine coverage during the specified flu season. This helps us understand how well communities are protected from flu each season.

About our data: How do we measure this?

Data source: The Wisconsin Immunization Registry (WIR)

Vaccination administration: The cumulative number of flu vaccines administered.

Vaccine dose: One vaccine dose is one vaccine product (like a shot or a nasal spray).

Vaccination coverage: An estimated percentage of the whole population who have received a flu vaccine. This helps us understand how well communities are protected from flu. It also helps us see which areas and groups are less protected against flu.

Population estimates: Wisconsin Interactive Statistics on Health (WISH) query system totals.

Data shown are subject to change. Some examples of corrections or updates that affect coverage include:

  • Removing duplicates or merging and consolidation of records

For more information about these dashboards please contact Ashley Murphy

For more information about immunizations, visit the following: Wisconsin Immunization Program home page

Last Revised: October 20, 2022