Pima County has confirmed its first measles case of the year, officials say.
The new case is unrelated to the measles case confirmed by the county on New Year's Eve, Dr. Theresa Cullen, Pima County's health director, said Saturday during a news conference.
The risk to the community remains low, Cullen said.
The case involves an unidentified, fully vaccinated person who âdeveloped symptoms after returning to Arizona from international travel,â she said.
It is the first measles case in Pima County in 2026. Unrelated cases have also been reported in Maricopa and Pinal County.
The infected person did not require hospitalization and is recuperating from home.
Cullen noted two potential public exposures related to the case:
âĸ El Rio Health Northwest, 320 W. Prince Road, between 11:30 a.m. to 3:30 p.m. on Tuesday, Jan. 13, and between 9 a.m. to 2 p.m. on Wednesday, Jan. 14.
âĸ El Rio Health Congress, 839 W. Congress St., between 11 a.m. to 7 p.m. on Wednesday, Jan. 14.
Anyone with questions can call the county health department at 520-724- 7797.
About two weeks ago the county said an individual who recently crossed the international border from Mexico into Arizona tested positive for measles.
The state health laboratory confirmed the case Dec. 31, making it the only measles case reported in Pima County in 2025.
Previously, a measles case hadn't been confirmed in Pima County since 2019.
Measles is a highly contagious but preventable viral disease. Vaccination is the most effective protection, health officials say.
Measles can spread through direct contact, infected surfaces, and live in the air for up to two hours.
One infected person can potentially infect up to 18 unvaccinated people, and the virus can spread before symptoms start â up to four days before a rash appears, health officials say.
Symptoms typically appear 14 days after exposure and may include fever, cough, runny nose and red eyes, followed by a rash.
An ongoing outbreak of measles at the Arizona-Utah border spiked measles cases statewide in 2025.
