Walmart shareholders were treated to quite a show last week including performances by Jamie Foxx, Mariah Carey, Mary J. Blige, Josh Groban and others. However, 142 attendees of the annual shareholders meeting in Fayetteville were treated to something a little less pleasant: measles vaccinations.

According to Ed Barham, spokesman for the Arkansas Department of Health, all but eight of those vaccinated were visiting from other countries.

“Somebody that came in from another country to the shareholders meeting became ill and the symptoms were not completely consistent with measles, although a couple were,” Barham said. “He was tested for a number of things and out of an abundance of caution, a bunch of people were vaccinated for measles who had not had their measles, mumps and rubella shots.”

As of yet, no tests have confirmed measles in anyone.