Between 2020 to 2023, Santa Clara County kindergarteners had some of the highest vaccination rates in the state, according to the California Department of Public Health.
The case is the first Santa Clara County has had since a resident tested positive for measles in 2019, Rudman said. Other non-residents who have tested positive have also traveled through the county.
Trivedi said Alameda County last had a confirmed measles case last year.
Across California, 11 measles cases have been confirmed in seven counties this year in addition to the one in Alameda and Santa Clara. San Mateo is the only other Bay Area county with a case.
The most common symptoms of measles are fever, cough, rash, runny nose and red eyes. Symptoms can take between one to three weeks to appear after being exposed.
People who have an illness or take medications that weaken their immune system, those who are pregnant and infants are most at risk. Anyone in those groups who shows symptoms after a potential exposure should contact their health provider.
If planning on going to visit a health provider, officials said it’s important to call ahead to ensure the facility can protect against potential exposures.
