Overview
- Maricopa County announced on Friday that seven additional residents tested positive for measles, bringing the county total to 21 cases so far this year.
- County health officials identified two recent exposure sites: Tempe Marketplace on July 6 with a symptom watch through July 27 and the Walmart at 13770 W. Bell Road in Surprise on July 12 with a symptom watch through August 2.
- State data show 332 measles cases in Arizona since 2025 concentrated in Colorado City, with about 96% of recent cases in unvaccinated people and roughly two-thirds of cases in children.
- A positive measles signal in wastewater from Sedona and new cases in neighboring counties signal wider geographic spread and have prompted expanded surveillance efforts.
- Officials stress that measles is highly contagious, symptoms usually appear 7–12 days after exposure, two MMR vaccine doses are about 97% effective, and people who develop symptoms should stay home and call a health provider.