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FILE - A vial of the measles, mumps and rubella vaccine is on display at the Lubbock Health Department, Feb. 26, 2025, in Lubbock, Texas. (AP Photo/Mary Conlon, File)

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FILE - Anna Hicks prepares a measles, mumps and rubella vaccine at the Andrews County Health Department, Tuesday, April 8, 2025, in Andrews, Texas. (AP Photo/Annie Rice, File)

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According to the Delaware Division of Public Health, an individual who was not symptomatic but was infectious with measles at the time visited Nemours on Dec. 29. The division said anyone who visited the facility between 6 a.m. and noon could have potentially been exposed.