The Pima County Health Department has confirmed a case of measles in an individual who recently traveled to the state from Mexico.
County health officials say the individual was quickly hospitalized after traveling across the border and isolated in a medical facility in Tucson.
Officials say there has been no known public exposure of the highly contagious illness in Pima County.
The case comes as a measles outbreak in Mohave County along the Utah border has reached 200 cases in recent months — the state’s largest outbreak in decades.
Sonora, the Mexican state that borders Arizona, confirmed 111 measles cases in 2025. The neighboring Mexican state of Chihuahua has had by far the largest outbreak in Mexico, with 4,481 confirmed cases last year.
More Southwest Border news
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In a post, the State Department called Mexico’s progress on border security “unacceptable.” Meanwhile, Mexico’s president is calling on the United States to do more to stop the flow of firearms into her country. -
Arizona is considering pumping water from a desalination plant on the Gulf of California to boost its water supply, but would need buy-in from Mexico. -
Arizona U.S. Rep. Greg Stanton is one of the congressional representatives who introduced the bill after threats from President Donald Trump. -
The Trump administration says it’s deported more than 600,000 people in the first year of its aggressive deportation campaign. And, a whole lot of them have gone to Mexico. -
Nearly a year after launching the initiative to publicize arrests and drug busts in Mexican states near the border with the United States, authorities have also seized more than 7,000 firearms and 600 kilograms of fentanyl.
