On Jun. 9, 2025, the Navajo County Public Health Services District (NCPHSD), in coordination with the Arizona Department of Health Services (ADHS), confirmed four cases of measles within Navajo County. The individuals were not immunized and have a recent history of international travel. All individuals were exposed through a single source. These mark the first confirmed measles cases in both Navajo County and the state of Arizona in 2025.

Public health officials are actively working to identify locations where potential exposure may have occurred and are in the process of notifying individuals who may have been exposed. Those identified will be advised to monitor for symptoms for 21 days following the exposure period and to consider avoiding public spaces or high-risk environments during that time.

Getting immunized is the most effective way to protect yourself, your loved ones, and your community from measles — a highly contagious and potentially deadly disease that is easily spread among those who are not immunized.

Measles is more than just a childhood illness—it can lead to serious health complications. About 1 in 5 people in the U.S. who contract measles require hospitalization, and in rare cases, severe complications can be life-threatening for young children.

These outcomes are preventable. More than 99% of individuals who receive both recommended doses of the MMR immunization develop long-term immunity.