Health officials in Maricopa County have confirmed the first measles case of 2026 in the Phoenix area. The patient, an adult resident of the Valley, was hospitalized after contracting the highly contagious virus.
According to the Maricopa County Department of Public Health (MCDPH), the infection is connected to recent international travel, though the individual was not infectious during their trip. County health authorities are now working to identify and notify anyone who may have been exposed.
Measles, a virus known for its high transmission rate, spreads through the air when an infected person coughs or sneezes. The virus can remain active in the air or on surfaces for up to two hours. Symptoms often appear one to two weeks after exposure and may include high fever, cough, runny nose, red and watery eyes, diarrhea, and a distinct full-body rash.
Health experts continue to stress that vaccination remains the most effective form of protection. The MMR vaccine—covering measles, mumps, and rubella—is about 97% effective after two doses. Children are typically vaccinated in two stages, while unvaccinated adults are urged to receive at least one dose.
Arizona saw a spike in measles activity last year, with 220 confirmed cases in 2025, most linked to an outbreak near the Utah border in Mohave County, according to the Arizona Department of Health Services. Prior to this new case, three measles infections had already been confirmed in Arizona this year, all in Mohave County.
Health officials advise anyone who develops measles-like symptoms to stay home, limit contact with others, and seek medical guidance before visiting a healthcare facility to reduce potential exposure.
