Measles
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Maricopa County Measles Outbreak Closed
Maricopa County Department of Public Health (MCDPH) Public Health Measles Health Alert for Healthcare Providers: September 16, 2026
Maricopa County Department of Public Health (MCDPH) has closed our latest measles outbreak (23 cases total) after two full incubation periods (42 days) without additional cases.
While the outbreak is closed, the opportunity for cases remains high in the setting of the ongoing outbreak in both the United States and globally. Related to this, MCDPH has confirmed a case of measles in an adult who resides in Maricopa County. The case was associated with overseas international travel and required hospitalization. MCDPH is working to identify and notify anyone who may have been exposed.
MCDPH continues to encourage providers to consider measles in the differential of unvaccinated individuals who present with fever and a rash. Healthcare providers can continue to report suspect cases of measles to MCDPH by calling (602) 506-3747.
MCDPH maintains a Measles Information website with current case counts and a list of public exposures. Please monitor this site for updates.
: There are no active public exposure sites in Maricopa County.
| Location | Date/Time | Time | Last Day of Symptom Watch |
|---|---|---|---|
Resources:
- CDC Measles for Healthcare Providers website
- CDC Interim Infection Prevention and Control Recommendations for Measles in Healthcare Settings
- Arizona Department of Health Services Health Professionals website
- Arizona Department of Public Health Measles Dashboard website
- Maricopa County Department of Public Health Measles website
Arizona Department of Health Services (ADHS)
CDC
American Academy of Pediatrics
County Resources
Measles Resources for Medical Providers:
- TAPI’s Measles Signs and Symptoms Flyer
- TAPI’s Measles in Your Community Flyer
- AAFP Measles Patient Care Webpage
- AAP Measles Patient Care Webpage
- ADHS Measles Clinician Resources
- ADHS Measles Clinician FAQs
- NACCHO: 2025 Measles Outbreaks: Resources and Updates for Local Health Departments
- ADHS Measles Surveillance Toolkit for Healthcare Settings
- CDC – It isn’t just a little rash – testing for clinicians
- CDC – MMRV Testing for Clinicians
- CDC – Measles Clinical Diagnosis Fact Sheet
- Social Media Resources
