Measles Alert: Potential Exposure at Chicago's Union Station Raises Public Health Concerns
September 18, 2026
Public health officials urge vaccination evaluation for those exposed and monitoring for symptoms such as fever, runny nose, cough, red watery eyes, and rash; immunity criteria include being born before 1957, prior measles infection, or having two MMR doses.
The Walgreens exposure window was September 9 from 8:00 a.m. to 10:25 a.m., and the virus can linger in the air for up to two hours after an infected person leaves.
Measles is highly contagious and can remain airborne for up to two hours, with serious risks like pneumonia or brain infection; updated vaccination information is available at phila.gov/measles and CDC resources.
Officials will post progress updates and new links as they become available, including a forthcoming codes page with freebies to boost progression.
Community hubs for Slayers 2 include a Discord server, a Wiki, a Trello board, a Roblox release page, Roblox game and group pages, a Trading Discord/HUB, and a YouTube channel.
Article notes that state dashboards and public health communications will provide ongoing updates.
CHOP declined to comment or share additional information.
Exposure location is Union Station at 255 South Canal Street in Chicago, with CDPH updating details as they become available.
Previous exposures at Nemours Children’s Hospital and UPMC Children’s Hospital reflect a broader statewide pattern of outbreaks.
Additional exposure locations and immunization clinics are listed on the Illinois Department of Public Health and Chicago Department of Public Health websites.
Public exposure updates are shared through media and the Maricopa County exposure list, with further information at maricopa.gov/measles and /fallwinter.
The outbreak is driving resource-intensive responses in hospitals, including staff coordination, infection control, and potential visitor restrictions.
Summary based on 22 sources
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Sources

Patch • Sep 18, 2026
Possible Measles Exposure At CHOP, Including Newborns: Officials
6ABC Philadelphia • Sep 17, 2026
Philadelphia health department warns of possible measles exposure at CHOP
