The Montgomery County Department of Health and Human Services Office of Public Health said a patient infected with the measles was seen at Children’s Hospital of Philadelphia in King of Prussia on Wednesday, The Philadelphia Inquirer reported.

The case is part of a “national surge” and was one of 164 across nine states this year.

“More information will be shared regarding exposure sites, dates and times when available,” a spokesperson for the county’s public health office said in a written statement. “CHOP and the Office of Public Health have been in contact with potentially affected individuals.”

In January 2024, there were eight reported measles cases in Philadelphia, The Inquirer said. The United States had eliminated measles in 2000, though the ongoing outbreaks are caused by a “critical percentage” of parents choosing not to vaccinate their children.

To prevent the contraction and spread of the disease, health officials highly recommend the MMR vaccine.

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