Pennsylvania is battling a major measles outbreak in 2026, and its epicenter is Lancaster County.
Years before he became the country's top health official, Robert F. Kennedy Jr. traveled to that same county and told a crowd of roughly 1,500 people that vaccines had never been properly tested for safety.
State health officials say the outbreak took hold in the Lebanon-Lancaster area of south-central Pennsylvania in late April and has since spread across multiple counties.
By late June, Pennsylvania had confirmed 84 cases, with 72 tied to the localized chain of transmission. Several patients have required hospitalization for complications including kidney and liver problems.
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Nationally, the picture is worse.
The Centers for Disease Control and Prevention has counted 2,465 confirmed measles cases through August 6, 2026, the highest annual figure since 1991. About 93 percent of patients this year were unvaccinated or had unknown vaccination status, and roughly 7 percent have been hospitalized.
A speech that landed in fertile ground
On July 31, 2021, Kennedy spoke in Lancaster County to a crowd made up largely of the Plain community, which includes Amish and Mennonite families. According to a prepared transcript from the event that later became public, he claimed vaccines are the only medication that "never has to be tested for safety against a placebo," a statement that vaccine researchers and regulators reject as false.
That speech landed in a county with unusually patchy childhood immunization coverage. Two-dose measles, mumps and rubella (MMR) coverage among Lancaster County kindergartners was reported at 89 percent in the 2024-2025 school year, below the 95 percent threshold public health experts consider necessary to stop measles from circulating.
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Measles is one of the most contagious diseases known. A single infected person can pass the virus to nine out of ten susceptible people around them, and the virus can linger in a room for up to two hours after an infected person has left.
Officials race to close the gap
Pennsylvania Secretary of Health Dr. Debra Bogen has said the state is leaning on contact tracing and community outreach to slow spread.
"Our epidemiologists, our community health nurses, and our local partners are working diligently to get measles under control," Bogen said in a June update. "We have a robust, proven contact tracing system in place, and we will not slow down until this outbreak is over."
Kennedy, now the U.S. Secretary of Health and Human Services, has taken a more mixed line since joining the administration.
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During Senate testimony on April 16, 2026, he agreed that the MMR shot is safe and effective, but added the qualifier "It's safe for most people." Asked days later what he was doing to improve vaccination rates, Kennedy told senators, "Improve the MMR. We promote the MMR. We have advised every child to get the MMR."
What it means for families
For parents, the practical point is straightforward. Two doses of the MMR vaccine give about 97 percent protection against measles, and the shot is the single strongest tool for keeping outbreaks like Lancaster's from taking hold. Anyone unsure of their child's vaccination status, or their own, should check records with a pediatrician or family doctor.
Measles typically begins with fever, cough, runny nose and red eyes, followed by a rash that starts on the face and spreads down the body. Parents who suspect measles should call ahead before visiting a clinic, since the virus spreads easily in waiting rooms.
The outbreak in Lancaster County is a reminder that once vaccination coverage slips below a critical threshold in a community, a highly contagious disease does not need many opportunities to return.
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This article is made and published by Jesper Bengtson, who may have used AI in the preparation.