 This message is being sent to Tribal health directors, local health officers, local health department staff, local health department nurses, Vaccines for Children providers, Vaccines for Adults providers, Wisconsin vaccinators, and key DHS staff.
July 2025
Wisconsin Vaccine Preventable Disease Updates provides statewide data on select vaccine preventable diseases from the previous month.
Measles
Wisconsin has had no cases in 2025 as of June 30, 2025. The Centers for Disease Control and Prevention (CDC) has reported 1,267 confirmed measles cases occurring in 38 jurisdictions as of July 1, 2025. CDC updates their measles case webpage weekly on Fridays. Two-thirds of cases (65%) are under 20 years of age, 92% are unvaccinated or have an unknown vaccination status and 12% of cases have been hospitalized, with three deaths reported.
Wisconsinites continue to be exposed to measles while traveling both domestically and internationally. It is important to ensure all eligible Wisconsinites are up to date on their measles vaccines. The Wisconsin Department of Health Services (DHS) has a flyer, Traveling? Protect yourself against measles first, with information about measles and travel. You can find this flyer and more new and updated measles resources on the DHS measles webpage, including:
MMR Resources
Pertussis
As of July 30, 2025, Wisconsin has 418 confirmed cases statewide in 2025. Since January 1, 2025, 61 counties have had at least one case. While cases range in age from 1 month to 82 years, more than a quarter (28%) of the cases are in adolescents aged 11-18 years. Thirty-eight infants have been identified with pertussis, and 11 have been hospitalized. No deaths have been reported. Overall, cases have been declining since the beginning of the year.
The most recent pertussis case count data can be found on the pertussis dashboard where users can explore trends and view data at the state, region, and county levels. Please note the data are preliminary and subject to change. The data in this dashboard is updated on the third Monday of every month.
The Communicable Disease Case Reporting and Investigation Protocol: Pertussis has been updated. It contains up-to-date information on laboratory testing, clinical presentation, and treatment for Pertussis.
Varicella
As of June 30, 2025, Wisconsin has 93 confirmed and probable cases statewide in 2025. Since January 1, 2025, 46 counties have had at least one case. About 51% of the cases had a positive laboratory test. While cases range in age from 4 months to 59 years, the median age of the cases is 10 years. Two individuals have been hospitalized. The majority of cases continue to occur among unvaccinated individuals with about 61% of cases having no doses of varicella vaccine. No deaths have been reported.
Varicella resources
Mumps
As of June 30, 2025, Wisconsin has five confirmed cases in 2025. Cases have occurred in two counties in the western part of the state and range in age from 17 to 65 years. One individual has been hospitalized. No deaths have been reported.
Mumps resources
Wisconsin vaccination rate data
The immunization program has vaccination rate dashboards for children and adolescents, influenza, COVID-19, and RSV. These dashboards display vaccination data by location, age group, and demographics. The influenza dashboard also highlights how the CDC’s Social Vulnerability Index (SVI) aligns with influenza vaccination coverage.
Resources for improving vaccine confidence
Health care providers are one of the most trusted sources of health and vaccine information. Here are some resources you can use to talk confidently with your patients about vaccines.
Immunize.org—Educational resources to advocate removing barriers to vaccination for all. Includes vaccination schedules, FAQs, templates and handouts, and translated vaccine information statements (VIS).
Philadelphia Immunization Program | Handouts & Materials—Hand out titled Ultimate Guide to Talking Vaccines with Adults.
Increasing vaccine confidence: Strategies for clinicians—Web series from the American Psychological Association.
Vaccine Confidence Toolkit - Association of Immunization Managers—Vaccine confidence toolkit from the Association of Immunization Managers (AIM).
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