Zika: Wisconsin Data

Aedes Aegypti mosquito

All Zika virus cases that have been reported among Wisconsin residents were associated with travel. This means that the cases occurred among people who traveled to locations with active Zika virus transmission, or had sexual contact with someone who traveled to locations with active Zika virus transmission, or were born to a mother who traveled to locations with active Zika virus transmission during pregnancy.

Wisconsin Department of Health Services (DHS) conducts surveillance for Zika virus infections by tracking physician- or laboratory-reported cases of Zika virus and by offering fee-exempt testing for qualifying patients.

Below are data for confirmed travel-associated Zika cases in Wisconsin. No cases of Zika virus have been identified among Wisconsin residents since 2017. For more details on 2016 data see the 2016 Zika Data Brief, P-01846 (PDF).

Zika virus data

Cases reported by...

Data limitations

The summary data from Wisconsin travel-associated Zika virus cases during the 2016-2017 outbreak do not necessarily reflect the characteristics of the disease observed nationally. However, in looking more closely at our Wisconsin cases, we may be able to identify geographic, temporal, or other epidemiological trends specific to travel-related exposures in Wisconsin residents. This information could be of use in discussions with patients or in designing and implementing outreach and prevention activities.

Due to the nature of Zika virus infections, with about 80% of people infected experiencing no symptoms, the 2016-2017 case count is likely a significant underrepresentation of the true number of infections among Wisconsin residents.

Last revised January 7, 2025