INLAND EMPIRE – (INT) - A Riverside County resident has tested positive for measles. Officials with Riverside University Health System said it is the first confirmed case of measles in Riverside County since 2018.

The adult, who has a recent history of international travel, lives in eastern Riverside County and is recovering at home. It could not immediately be determined if the patient had been vaccinated.

It is the ninth confirmed measles case in the state. Eight other cases were found in Fresno, Los Angeles, Orange, Placer, San Mateo and Tuolumne counties, according to the California Department of Public Health.

Recent international travel has been an important risk factor in the 2025 California measles cases.

Story Date: April 15, 2025