Kindergartens Most Vulnerable to a Measles Outbreak

Each circle represents a school where less than 95% of kindergarten students received the measles, mumps and rubella vaccine during the 2025-26 school year. Epidemiologists say a 95% vaccination rate is needed to prevent community spread of the virus.
The size of the circle corresponds to the size of the student body.

Three cyber schools were excluded from the graphic
Schools with fewer than 20 kindergarten students were excluded for privacy reasons.
Chart: Lizzie Mulvey / StaffSource: Pennsylvania Department of Health