State, city, and county health departments say an infected passenger flew from Phoenix to Milwaukee Mitchell International Airport last week. The patient is now isolating in Walworth County.

Officials say anyone who was on the January 29 flight or was inside Mitchell Airport after the plane landed that night may have been exposed to measles. They say those individuals should monitor for symptoms through February 19.

The case has raised concern among travelers at the airport.

“I’m worried to hear that it is being spread possibly, especially in airports,” said Sarah Mentzel, a traveler.

Some travelers say it is troubling to hear about measles cases.

“It used to be eradicated and seeing it still happening and people still getting affected in 2026 is worrying especially for people who are immunocompromised,” Mentzel said.

Health officials say the infected person had been told to isolate before traveling but still went to several locations.

For some travelers, that decision highlights the importance of thinking about others.

“We’ve got to think beyond ourselves, we've got to think about others. It’s like going to work with a cold. You mean well because you want to work, but at the same time you’re going to spread this so you have to do more diligence to keep the community safe,” said Jason Stewart, a traveler.

News of the case has made some travelers more cautious while moving through public spaces.

“It certainly changes my behavior already. I was just walking through some of the shops touching things. I can guarantee you my hands will be in my pockets for the rest of the remainder here. I’ll be a lot more aware of my surroundings because of it,” Stewart said.

Health leaders say the case is another reminder to get vaccinated, calling vaccination the best protection against measles.

Travelers say the message going forward is clear.

“Listen to doctors when they tell you to isolate, keep yourself safe and take care of yourself,” Mentzel said.