A child who entered the country from China last week at John F. Kennedy International Airport in New York later tested positive for measles in Pennsylvania, sparking concerns about those who might have come in contact with the child.

The child, a U.S. national who was not vaccinated for measles, arrived at the airport’s Terminal 4 last week aboard a China Airlines flight and took a shuttle bus Feb. 25 to Pennsylvania, where the child tested positive at two clinics, multiple media outlets reported.

Anyone who was on the shuttle bus between 9:30 p.m. ET on Feb. 25 and 3:15 a.m. on Feb. 26 is being urged to get tested for the highly contagious disease, Montgomery County, Pennsylvania, health officials said Sunday in a news release.

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