Health officials have issued a public advisory after a confirmed measles case involving travel through O’Hare International Airport in Chicago. Authorities said people who were in the affected terminal during the specified timeframe may have had potential exposure and should follow official guidance.

According to public health updates, the infected individual later tested positive and is now isolating at home. Contact tracing is underway to identify and notify anyone who may have been in close contact. Officials also confirmed a separate measles case in the same region and are investigating whether the two cases are connected.

Measles is described as “a contagious viral illness that spreads through respiratory droplets when an infected person coughs or sneezes.” Health experts warn that the virus “can remain in the air for a limited period in enclosed spaces,” which is why shared areas like airports require careful monitoring when exposure is possible.

Medical authorities, including the Centers for Disease Control and Prevention and the Illinois Department of Public Health, stress that vaccination is the most effective protection. They note that “Two doses of the MMR vaccine provide strong protection for most individuals.”

Anyone who believes they may have been exposed should monitor for symptoms and consult a healthcare professional if needed. Officials recommend checking official public health announcements for accurate and updated information.