California Warns of Measles Exposure Across 6 Counties After Unvaccinated Passenger Traveled by Train
Updated
Updated · mymotherlode.com · Sep 20
California Warns of Measles Exposure Across 6 Counties After Unvaccinated Passenger Traveled by Train
3 articles · Updated · mymotherlode.com · Sep 20
Summary
California health officials said a hospitalized, unvaccinated visitor may have exposed fellow travelers to measles after arriving in Los Angeles by Amtrak on Sept. 10 and continuing by train and bus.
CDPH is working with multiple counties and the CDC to trace contacts, with Tuolumne County urging Mother Lode residents who used those routes to call their doctors.
The passenger made transfers in at least six counties—Alameda, Butte, Kern, Los Angeles, Sacramento and San Joaquin—expanding the potential exposure footprint across the state.
Officials used the case and earlier California outbreaks this year to press MMR vaccination, noting measles can cause permanent brain damage or death and that California recorded 3 confirmed measles deaths in 2025.
Could a single infected traveler at Philadelphia's airport trigger a massive new wave in Pennsylvania's ongoing 2026 deadly measles outbreak?
With local school vaccination rates plummeting, how vulnerable is the public to the highly contagious airborne measles virus lingering in airport terminals?