Health authorities are investigating a confirmed case of measles in Pima County involving a Tucson resident.
The resident was fully vaccinated and developed symptoms after returning to Arizona from international travel, the Pima County Health Department said in a news release Friday evening.
The department is conducting a public health investigation to identify and notify anyone who may have been exposed, but said in the release, "Currently, the overall risk to the general public remains low."
The investigation has determined locations where potential exposure to measles may have occurred as a result of this confirmed case. Anyone who was at these locations during the dates and times listed should watch for any symptoms for the next two to three weeks:
La Posada Oro Valley, 11050 N. Avenida Posada De Oro, July 9, 10 a.m.Â
Oro Valley, AZ, July 9, 10 a.m.-10 p.m.
L.A. Fitness, 4240 N. First Ave., July 9, 8-11:30 p.m. Â
Sprouts, 4282 N. First Ave., July 9, 9 p.m.
Quiktrip, 68 W. River Road, July 10, 9 a.m.
La Posada Oro Valley, 1050 N. Avenida Posada De Oro. July 10, 10 a.m.
Tucson Mall, 500 N. Oracle Road, Hollister/Aeropostale, HMN, Lids and Pink, July 11, 5-9:30 p.m.
Banner - University Medical Center South, Emergency Department, 2800 E. Ajo Way, July 14, 7 a.m.
Walmart, 455 E. Wetmore Road, July 14, 7 p.m. Â
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The Health Department will be contacting individuals who may have been exposed; the calls will come from a number that starts with 520-724. Those exposed may also receive a text message from the department.
Symptoms typically appear 7–14 days after exposure and may include: fever, cough, runny nose, red, watery eyes, and a rash that usually begins on the face and spreads downward.Â
Anyone who believes they may have been exposed to measles and is experiencing symptoms should: stay home and avoid contact with others; contact a healthcare provider or PCHD (520-724-7797) before seeking in-person care; and follow public health guidance to prevent further spread.
Measles is a highly contagious viral infection that can cause permanent damage or even death, especially for children under age 5. It is one of the most contagious illnesses but is preventable; vaccination remains the most effective protection, the health department says.
Cluster in Maricopa County
Also on Friday, public health officials announced they are investigating a measles cluster linked to a business in the unincorporated Maricopa County community of Aguila, along U.S. 60 about 90 miles northwest of downtown Phoenix, The Arizona Republic reports.
The cluster includes at least seven confirmed cases, the Maricopa County Department of Public Health said.
Maricopa County public health officials said they are working with the employer and local partners to respond, The Republic reports.
The cluster brings Maricopa County's total number of measles cases in 2026 to 21 — significantly higher than the annual average of one case per year over the past 30 years.
Pima County reported three confirmed measles cases between New Year's Eve 2025 and Jan. 28 this year. Â
