At least 12 Bucks County schools recorded kindergarten MMR vaccination rates below 90% in 2024, well under the 95% threshold medical experts say is needed to prevent measles from spreading through a community. The finding comes from a Philadelphia Inquirer analysis of state data, as reported by Central Bucks News, and lands as Central Bucks School District students head back to classrooms Monday, Aug. 31, and Pennsylvania battles its worst measles outbreak in three decades.
The county's overall student MMR rate now stands at 95.6%, down from 97.6% in the 2019-2020 school year.
Most of the 12 schools below the 90% mark were faith-based private or charter schools. The Palisades School District in Upper Bucks County was the only public district with multiple elementary schools under that line. No Central Bucks schools appeared among the 12.
Statewide outbreak intensifies
Pennsylvania has confirmed 379 measles cases so far in 2026, including 89 new cases identified the week ending Friday, Aug. 21. That's a dramatic jump from 16 total cases in all of 2025. Seventy people have been hospitalized; none were fully vaccinated.
No one has died.
The state trails only Utah and South Carolina in total cases, making it the nation's third-largest outbreak. The highest concentrations have been in Lancaster and Chester counties. Bucks County has reported no confirmed cases this year, though neighboring Montgomery and Northampton counties have documented a small number of infections.
New state dashboard shows school-level data
Families can now check their own school's rates through a new state vaccination dashboard, as the Doylestown Observer reported, launched Aug. 6 by the Pennsylvania departments of Health and Education. It marks the first time school-level immunization data has been publicly available statewide.
State Health Secretary Dr. Debra Bogen said in an Aug. 6 news release that the tool puts immunization data directly into families' hands so they can work with local leaders to reduce the risk of vaccine-preventable diseases like measles and whooping cough.
Statewide, about one in three kindergartners attends a school where MMR rates fell below 95% last year. More than 200 schools reported a perfect 100% rate.
Charter school enforcement gaps
A Pittsburgh Post-Gazette investigation published Sunday, Aug. 23, found that nearly two-thirds of Pennsylvania's 170 charter schools allowed children who didn't meet vaccine requirements to attend class. Last year, nearly 6,000 students entered charter school classrooms without meeting immunization standards.
Dr. Paul Offit, a pediatrician at Children's Hospital of Philadelphia, told the Post-Gazette: "How many more people need to get hospitalized? … We shouldn't wait around for this to get worse."
What parents should know
Pennsylvania law allows vaccine exemptions for medical reasons, religious beliefs, or strong moral and philosophical convictions. Health officials have warned that exempt students may be excluded from school during an active outbreak.
Measles can linger in the air for up to two hours after an infected person leaves a room, and people can spread the virus four days before symptoms appear. Two doses of the MMR vaccine provide lifelong protection for most people, the CDC says.
The state plans to add district-level search capability to its vaccination dashboard later in 2026.
