Measles cases climb to 16 in Maricopa County as Sky Harbor Terminal 4 flagged as exposure site

Maricopa County reported a new measles case Wednesday, bringing the county’s total to 16 cases so far this year.

That is “significantly higher” than the county’s average of one case per year over the past 30 years, according to the Maricopa County Department of Public Health.

Health officials said the latest public exposure site was Terminal 4 at Phoenix Sky Harbor International Airport from 6 a.m. to 9:30 a.m. June 17.

The county issues public exposure notices when it cannot identify everyone who may have been exposed.

Anyone who was in Terminal 4 during that time should check their vaccination status and monitor for symptoms through July 8, even if they feel healthy.

If you were in Sky Harbor Terminal 4 on June 17, watch for measles symptoms

Measles symptoms can include a fever of more than 101 degrees, red or watery eyes, a cough, a runny nose and a red, raised, blotchy rash. The rash typically appears after other symptoms, starting on the face near the hairline before spreading down the body.

The measles virus can linger in the air for up to two hours, and about 90% of unvaccinated people who are exposed will become infected, officials said.

People who may have been exposed are urged to contact a health care provider before seeking in-person care to avoid spreading the virus.

Arizona health officials logged 220 measles cases in 2025.

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