Health authorities are investigating a confirmed case of measles in Pima County involving an international visitor who recently traveled across the state into Southern Arizona, the Pima County Health Department announced Friday night.
The individual developed symptoms after direct exposure to a previously reported measles case in Colorado, the department said in a news release. The person is not hospitalized and is isolating and recovering at home.
"The overall risk to the public is low," said the county Health Department, which is working to identify and notify people who may have been exposed.
The department says anyone who was at the Banner - University Medical Center Emergency Department, 1625 N. Campbell Ave., from 10:30 a.m. to 2:30 p.m. Sept. 24 should monitor for measles symptoms through Oct. 15.
The Health Department will be contacting people who may have been exposed; calls will come from a 520-724 phone number.
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Anyone who thinks they may have been exposed to measles and is experiencing symptoms should stay home, avoid contact with others, and contact a healthcare provider or the county Health Department (520-724-7797) before seeking in-person care.
Symptoms typically appear 7–14 days after exposure and may include: fever, cough, runny nose, red and watery eyes, and a rash that usually begins on the face and spreads downward.
"Measles is a highly contagious but preventable disease. Vaccination remains the most effective protection," the news release said.
MMR (measles, mumps, rubella) vaccinations are available at all Pima County Health Department clinics, regardless of insurance status. The vaccine is also available at many commercial pharmacies, primary care providers and federally qualified health centers.
For more information about measles and where to get vaccinated, see pima.gov/measles or call PCHD Epidemiology at 520-724-7797.
The Arizona Department of Health Services website says Pima County had seen three confirmed measles cases this year as of Sept. 22; this newest case brings the number to four, up from one case last year.
Maricopa County has logged 28 confirmed measles cases this year, the highest number in more than 30 years, ADHS says. Mohave County has had 69 confirmed cases in 2026.
