Chester County High School Closes Due to Confirmed Measles Case Amid Pennsylvania Outbreak

A high school in Chester County, Pennsylvania, has closed today, October 9, 2026, following a confirmed case of measles. This incident is part of a broader measles outbreak in Pennsylvania, which has seen 379 cases recorded across the state, with the majority affecting individuals who are not fully vaccinated. Measles is a highly contagious virus that can lead to serious complications.