DuPage County reports first measles case of 2026

What happened

DuPage County reported its first measles case of 2026. The county also identified Chicago O’Hare Airport as an exposure location connected with the case.

The announcement establishes two facts: the case is in DuPage County, and the exposure location includes O’Hare Airport. The report does not identify the person involved in the case in the information published here.

Where the exposure occurred

Chicago O’Hare Airport is the location named in connection with the exposure. The announcement does not identify a terminal, flight, date or time for the exposure.

That means travelers and airport workers cannot determine from the announcement alone whether they were at the airport during the relevant period. Any later county notice could add details about the location or timing of the exposure.

What the county has reported

The DuPage County report concerns one measles case and describes it as the county’s first of 2026. It does not announce additional cases or provide a total number of people exposed.

The report also does not state whether the case involves a DuPage County resident, where the person is receiving care or whether any public health action has been ordered. Those details are separate from the county’s identification of the case and O’Hare Airport exposure location.

What to watch next

The next public update from DuPage County could identify the exposure period, airport location or steps for people who may have been at O’Hare. Public health updates could also clarify whether additional cases or exposures have been identified.

For now, the confirmed development is DuPage County’s first measles case of 2026 and the county’s identification of Chicago O’Hare Airport as an exposure location. CBS News carried the development.