Overview
- A Santa Clara County resident who likely caught measles during international travel moved through SFO’s international terminal and visited Trader Joe’s (635 Coleman Ave.) and the International Halal Market (960 E. Santa Clara St.) during infectious windows on June 8.
- Santa Clara County Public Health is working with the California Department of Public Health and the CDC to identify and notify possible close contacts and to help the three locations reach exposed visitors.
- Health authorities say anyone at those sites during the listed times should review MMR vaccination records, watch for symptoms for 7–21 days, call a medical provider before visiting if symptomatic, and seek immediate care if pregnant, an infant caregiver, or immunocompromised.
- Officials stress that high local vaccination rates give strong community protection but warn that pockets of unvaccinated people and heavy international travel for World Cup events raise the risk of onward spread.
- State and national totals have risen since 2023, with California reporting 49 confirmed cases as of June 8 and most infections in unvaccinated people; measles spreads by airborne droplets, can infect about 90% of susceptible people, and post-exposure vaccine or immunoglobulin may help if given quickly.