Passengers may have been exposed to the measles at Philadelphia International Airport on Sunday, health officials said.

The warning is specific to people who used Terminals A and B between 8:50 a.m. and 4 p.m. on Sunday, Nov. 9, according to a release from the city’s Department of Public Health. Travelers are asked to verify their immunization records and be aware of possible symptoms.

Health officials are warning travelers who recently visited Philadelphia International Airport of a possible measle exposure.

About a quarter of all PHL flights were delayed or canceled on Friday. That number rose to nearly a half on Sunday.

The airport said the closures will help keep the remaining checkpoints running smoothly despite shutdown-related staffing shortages.

Philadelphia International Airport is among 40 of the country's busiest airports that will cut flights by 10% starting Friday due to a shortage in air traffic controllers amid a historically long government shutdown.

Moderate lines at Philadelphia International Airport were a breath of fresh air for weary travelers as they navigated gate changes, delays, and flight cancellations Sunday.

Health officials are encouraging people who may have been exposed to check their vaccination status and watch for symptoms.

The Philadelphia Department of Public Health says an individual with measles was traveling through the airport and that the exposure may have happened at Terminals A and B at PHL on Sunday, between 8:50 a.

Unvaccinated people who were in terminals A and B on Sunday should quarantine and get immunized, officials say.

Philadelphia travelers may encounter delays and cancellations at Philadelphia International Airport airport starting Friday. The federal government shutdown, now officially the longest in U.S. history,