Overview
- Maricopa County reported 25 confirmed measles cases in 2026 and on July 21 published new public exposure windows tied to a non-resident who visited several Phoenix and Chandler sites on July 12–13.
- County investigators named six specific locations where people may have been exposed, including Chase Field, Chandler Fashion Center, The Taco Spot, Sonesta Select Hotel, IHOP and bb.q Chicken, and advised patrons to watch for symptoms through early August.
- Officials urged people to check immunization records because two doses of MMR are about 97% effective and unvaccinated people face roughly a 90% chance of infection if exposed.
- Public-health guidance, aligned with CDC advice, recommends an early MMR dose for infants 6 to 11 months and asks anyone with possible symptoms to stay home and call a provider before seeking in-person care.
- Statewide surveillance shows 341 cases since 2025 concentrated in Colorado City, most cases have been in unvaccinated people and children, 25 people were hospitalized, and agencies are using wastewater and institutional testing to track spread.