Measles Alert: SFO & San Jose Groceries Exposed

As of June 8, 2026, California has recorded 49 confirmed measles cases, marking its highest annual count in seven years and approaching the 2019 total. An infected individual recently traveled through San Francisco International Airport on a Thursday morning and visited two San Jose grocery stores later that evening, raising concerns about potential exposures.

Health officials are urging unvaccinated individuals to quarantine and monitor for symptoms like fever, cough, and rash, which can appear seven to 10 days after exposure. Pregnant women, infants, and immunocompromised individuals are particularly at risk. The outbreak highlights that 94% of state cases involve unvaccinated individuals, with over 80% affecting those under 19, despite high overall vaccination coverage in the Bay Area.

This situation mirrors past warnings in Santa Clara County and a broader national resurgence, including a significant outbreak in West Texas during 2025. Vaccination remains the most effective protection against measles, preventing widespread transmission even when exposures occur.