Chase Field in Phoenix and Chandler Fashion Center were listed as new measles exposure sites on July 12 and 13, respectively, according to the Maricopa County Department of Public Health. Officials said the locations were linked to a single measles case involving a non-resident visitor who traveled to multiple sites in Maricopa County.
The Maricopa County Department of Public Health (MCDPH) identified Chase Field, located at 401 E Jefferson St. in Phoenix, as a measles exposure site on Sunday, July 12, from 7 p.m. to midnight. Chandler Fashion Center, at 3111 W Chandler Blvd. in Chandler, was listed as an exposure site on Monday, July 13, from 12:30 p.m. to 4:30 p.m., according to the county’s official measles exposure table. Both locations are among six newly confirmed public exposure sites linked to a single measles case involving a non-resident visitor who traveled to multiple venues across Maricopa County, officials said.
People who were present at Chase Field during the July 12 exposure window are advised to monitor for measles symptoms through Sunday, August 2, which is 21 days after the exposure, the department said.
The exposure timeline began on Sunday, July 12, when the infected individual was at The Taco Spot, 885 N 54th St., Chandler, from 2:30 p.m. to 5:45 p.m. The visitor also stayed at the Sonesta Select Hotel, 920 N 54th St., Chandler, from 4 p.m. Sunday until 1 p.m. Monday, July 13. Following the hotel stay, the individual was at Chase Field in downtown Phoenix from 7 p.m. to midnight on Sunday evening. On Monday, July 13, exposures continued at IHOP, 5020 E Ray Rd., Phoenix, from midnight to 3:30 a.m.; bb.q Chicken, 1900 W Chandler Blvd., Chandler, from 11:15 a.m. to 2:30 p.m.; and Chandler Fashion Center from 12:30 p.m. to 4:30 p.m., according to MCDPH records.
Those who visited Chandler Fashion Center on July 13 should watch for symptoms through Monday, August 3. The 21-day observation period is based on the typical incubation period for measles, which ranges from seven to 12 days but can extend up to 21 days, officials explained.
Measles is a highly contagious viral disease that spreads through the air when an infected person coughs or sneezes, as well as through respiratory droplets that can linger in the environment. The Maricopa County Department of Public Health described primary symptoms as high fever, often exceeding 101 to 104 degrees Fahrenheit, red and watery eyes, cough, runny nose, and a red, raised, blotchy rash that typically begins on the face at the hairline before spreading downward. Individuals are generally contagious from four days before the rash appears to four days after, increasing the risk of transmission at crowded public venues such as sports stadiums and shopping malls.
Officials urged anyone who may have been exposed to check their vaccination status, particularly for the measles, mumps, and rubella (MMR) vaccine, which is considered the most effective prevention method. People without evidence of immunity or documented MMR vaccination should consult a healthcare provider about vaccination or receiving additional doses. The county’s guidance also instructs exposed individuals to stay home and call a healthcare provider immediately if symptoms develop, advising them to call ahead before seeking care to avoid exposing others.
The current exposures are part of a broader outbreak that has produced 25 confirmed measles cases in Maricopa County in 2026, according to local news reports citing health officials. This number represents a significant increase compared to the historical average of about one case per year over the last three decades. Earlier in the year, the county recorded 15 confirmed measles cases as of May 13, with additional cases identified as the year progressed.
Prior public exposure events in 2026 have included locations such as an Arizona Youth Sports basketball game in Mesa on April 11 and multiple venues in Gilbert, including Target, EOS Fitness, and Sam’s Club. These earlier exposures demonstrate ongoing community transmission and public-site risks within the county. Public health alerts have consistently provided detailed information about specific locations, dates, and exposure windows, along with clear instructions for symptom monitoring and vaccination verification.
Maricopa County maintains a public measles exposure table on its website, providing addresses, dates, and “watch for symptoms through” deadlines for each exposure site. The department encourages residents to use resources such as the Arizona immunization record system, myIR, or to contact the MCDPH CARES Team at (602) 506-6767 for assistance with vaccination records. Health officials continue to emphasize clinical vigilance, advising healthcare providers to consider measles in the differential diagnosis for patients presenting with fever and rash amid the ongoing outbreak.
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