Missouri lists venues with potential measles exposure after Amtrak-linked outbreak

Missouri lists venues with potential measles exposure after Amtrak-linked outbreak

Health

Missouri health officials warned that visitors to several locations in the St.  Louis area may have been exposed to measles and advised them to watch for symptoms for the next 21 days.

The alert follows a series of related notices that began in California, where state health authorities said an unvaccinated Amtrak passenger who traveled through six counties could have exposed other riders, and Los Angeles County officials later cautioned travelers at Union Station of possible exposure. In Missouri, health officials also ordered quarantine for more than 250 people in Jackson County after confirming a measles case linked to the Amtrak trip.

Actors

California Department of Public Health Dr. Rita Nguyen Amtrak Federal partners Local health agencies

Locations

Alameda County, California, United States Butte County, California, United States Kern County, California, United States Los Angeles County, California, United States Sacramento County, California, United States San Joaquin County, California, United States Los Angeles, California, United States Bakersfield, California, United States Stockton, California, United States Oroville, California, United States Sacramento, California, United States Emeryville, California, United States Denver, Colorado, United States

Articles

September 21, 2026
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Missouri health officials list venues with potential measles exposure
Missouri health officials list venues with potential measles exposure

STLPR • 21 Sep 22:34

The state health department warned that individuals who visited several St. Louis-area locations between Sept. 12 and Sept. 14 may have been exposed to measles and should monitor symptoms for 21 days.

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September 20, 2026
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Measles Exposure Linked to Amtrak Ride Prompts Quarantine of Over 250 in Missouri
Measles Exposure Linked to Amtrak Ride Prompts Quarantine of Over 250 in Missouri

Salina Post • 20 Sep 16:09

A confirmed measles case tied to an Amtrak trip has exposed more than 250 people in Jackson County, Missouri, leading health officials to order quarantine for at least ten unvaccinated individuals and urge increased vaccination.

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September 19, 2026
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Los Angeles County alerts possible measles exposure at Union Station
Los Angeles County alerts possible measles exposure at Union Station

ABC7 Los Angeles • 19 Sep 21:17

Health officials warn that travelers present at Union Station between 8 a.m. and noon on Saturday may have been exposed to measles from an infected passenger, urging monitoring for symptoms.

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California alerts public to measles exposure on Amtrak routes across six counties
California alerts public to measles exposure on Amtrak routes across six counties

The Guardian • 19 Sep 17:58

State health officials warn that an unvaccinated traveler with measles may have exposed passengers and station users in six California counties, and are working to notify potentially affected individuals.

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California health officials issue measles exposure alert after Amtrak passenger travels through six counties
California health officials issue measles exposure alert after Amtrak passenger travels through six counties

KCRA • 19 Sep 03:08

State health authorities warned that an unvaccinated traveler who rode Amtrak trains and buses across six California counties may have exposed passengers to measles, urging vaccination and monitoring for symptoms.

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