Orange County reports measles case in infant linked to international travel

Health authorities in Orange County have confirmed a measles case in an infant with a history of international travel, marking the county’s third reported case in 2026.

Following the confirmation, the OC Health Care Agency said they immediately notified individuals who may have been exposed in health care settings and other locations where potential contact occurred.

Authorities emphasized that measles remains highly contagious and urged residents to ensure they are vaccinated, particularly before traveling or hosting international visitors.

“Measles is highly contagious. Anyone planning domestic or international travel—or hosting visitors—should be fully vaccinated at least two weeks beforehand,” said Anissa Davis, deputy county health officer.

She also noted specific guidance for infants and travelers.

“Infants less than a year old who are traveling internationally should receive one dose of MMR vaccine before departure. Adults and others who are not immune remain at risk, especially as outbreaks continue across the country and worldwide.”

According to the Centers for Disease Control and Prevention, the United States has reported 1,792 confirmed measles cases in 2026. In 2025, there were 2,267 cases nationwide, the highest annual total in more than 30 years.

Health officials say common measles symptoms include fever, cough, red and watery eyes, and a rash that typically begins on the head before spreading across the body. 

According to health experts, the virus spreads easily through the air and through direct contact with an infected person. Individuals can be contagious from about four days before the rash appears until four days after it develops.

Officials urge anyone who suspects they may have measles to contact a health provider before visiting a medical office to prevent exposure. They also ask the public to report any suspected cases to the OC Health Care Agency.

For more information on measles, click here.