Los Angeles County Department of Public Health warned the public of a possible measles exposure at Union Station after an unvaccinated passenger with a confirmed case traveled through the hub on September 12 before boarding a bus to Bakersfield.
The alert, sent to health agencies in six neighboring counties, tells anyone who was at the station that day and is not up to date on measles vaccination to watch for symptoms and consider contacting a medical provider.
Measles spreads through respiratory droplets and can remain infectious in the air for up to two hours, making crowded transit areas a particular concern. The department’s notice follows standard protocol that triggers when a lab‑confirmed case is identified in a public gathering place.
Officials said the unvaccinated traveler was identified after developing a fever and rash typical of measles, and a laboratory test later confirmed the infection. The person left Union Station on a scheduled bus to Bakersfield, though the exact duration spent inside the terminal was not disclosed.
The public health message stresses that vaccination is the most effective way to prevent measles spread. People who have received two doses of the MMR vaccine are considered protected, while those lacking immunity are urged to seek medical advice promptly if they develop fever, cough, conjunctivitis, or a red rash.
Los Angeles County Department of Public Health will keep tracking the case and will provide updates to the community if further information emerges.
The department also recommends that travelers use the county’s online exposure notification tool to report recent visits to Union Station, enabling quicker identification of additional potential contacts.