The Oklahoma State Department of Health (OSDH) has confirmed nine measles cases among unvaccinated individuals in northeastern Oklahoma, with all cases linked to household or extended family exposures.
As of today, health officials have classified the cases as follows:
- Confirmed: 7 cases
- Probable: 2 cases
Two previously reported probable cases were reclassified as confirmed after establishing links to a lab-confirmed measles case.
No Public Exposures Reported
According to the OSDH, the risk of public exposure remains low, as those affected recognized their exposure early and self-isolated. The cases are believed to be connected to a measles outbreak in West Texas and New Mexico. Investigations into five new cases have not identified additional public exposure sites.
Health Officials Urge Vaccination
Measles is a highly contagious virus, but it is preventable with the MMR vaccine. The OSDH emphasizes that two doses of the MMR vaccine are 97% effective in preventing measles, and one dose is approximately 93% effective.
Ongoing Monitoring & CDC Updates
The OSDH, in collaboration with the Cherokee Nation, local health departments, and healthcare providers, continues to monitor the situation. Officials urge anyone contacted by the health department to cooperate fully to aid in public health investigations.
The CDC’s national measles case map will be updated Friday, March 28, 2025, to reflect Oklahoma’s reported cases.
For the latest updates, visit the OSDH measles situation page, which is updated Tuesdays and Fridays at noon, or immediately if new public exposures are identified.
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