On Mar. 14, 2025, the Oklahoma State Department of Health (OSDH) received notification of two more probable measles cases, and immediately began its investigation. Through the investigation, the OSDH learned the individuals were in public settings while contagious, creating a potential risk to the public.

Possibly exposed individuals who are not immune through vaccination or prior infection should exclude themselves from public settings for 21 days from the date of their potential exposure. 

Additionally, if anyone is experiencing flu-like symptoms, fever and/or a new rash illness and has visited any of these locations during the identified time frame, they should immediately exclude themselves from public settings.

If an individual needs to seek medical care, they need to call ahead to their health care provider and let them know of their symptoms and this exposure. Individuals with measles are contagious four days before their rash onset through four days after their rash began.

Both cases reported exposure associated with the Texas and New Mexico outbreak. Their initial exposure was not from the two individuals announced on March 11, 2025. All four probable cases occurred in unvaccinated individuals.