The Oklahoma State Department of Health is investigating the state's first confirmed case of measles since 1997.
The department said the individual is an international traveler and a spouse of an Oklahoma State University student who lives off campus.
OSDH is working with the Payne County Health Department and Oklahoma State University.
In a news release, the health department says anyone who visited the following locations in Stillwater may have been exposed to the measles virus:
The health department says anyone who thinks they may have been at risk of exposure should review their immunization records and contact their local county health department with any additional questions.
OSDH says persons are protected if they are immunized with two doses of a measles-containing vaccine after the first birthday, or if they were born during or before 1957.