The New Jersey Health Department says the person passed through Newark Liberty International Airport's Terminal B on Sunday, October 19, between 2:15 p.m. and 5:30 p.m.
Officials recommend anyone who thinks they were exposed or are ill to call the health department before seeing a doctor to avoid what could be a further spread of germs.
They say potentially exposed individuals, if infected, could develop symptoms as late as Nov. 9.
No additional associated cases in New Jersey have been identified, according to the health department.
Since the beginning of 2025, New Jersey has had a total of 10 confirmed cases of measles reported, according to officials. In 2024, seven cases were reported.
Symptoms to look out for:
Measles symptoms include a high fever, cough, runny nose, watery red eyes, and a rash that usually appears between three and five days after symptoms begin. The rash usually begins as flat red spots that appear on the face at the hairline and spread downward to the neck, torso, arms, legs, and feet. Measles can also cause serious complications, such as pneumonia and encephalitis (swelling of the brain), and can lead to miscarriage in pregnant people, premature birth, or a low-birth-weight baby.
How the virus spreads:
The virus spreads easily through the air when someone coughs or sneezes and can remain in the air for up to two hours after an infected person leaves the area. People can also get sick when they come in contact with mucus or saliva from an infected person.
Individuals at risk include those who have not been fully vaccinated or have not had measles in the past.
More information can be found online.