Kennedy Vaccine Fears Echo in Pennsylvania Measles Outbreak

Pennsylvania is confronting one of the largest measles outbreaks in the United States, with 232 confirmed cases across 18 counties as of Monday — the highest statewide total in three decades. Health officials are racing to contain the spread as new infections emerge weekly, with 57 cases recorded in the last seven days alone, according to The Philadelphia Inquirer.

The outbreak, which began in late April in the Lebanon-Lancaster counties region, has now reached every corner of the state, including new cases confirmed in Clearfield and Jefferson counties last week, as WJAC reported. At the center of the crisis sits Lancaster County, which has reported 133 cases this year — more than half of the state’s total — and where vaccination rates have fallen well below the threshold needed to prevent community spread.

A Community’s Declining Trust

Lancaster County has among the lowest vaccination rates in Pennsylvania, with just 87.6% of kindergartners and 83.3% of 7th graders vaccinated against measles — far below the 95% immunization threshold required to prevent community transmission of a disease so contagious that up to 90% of unvaccinated people exposed will become ill, the Inquirer reported.

The county’s declining vaccination rates reflect a broader erosion of trust in public health institutions that accelerated during the pandemic. As one Lancaster County community figure told The New York Times, “We had gained so much trust. Then the pandemic hit, bringing mask mandates, business closures and restrictions on church gatherings.”

Years before the outbreak, Robert F. Kennedy Jr. — now the U.S. Secretary of Health and Human Services — gave a speech in Lancaster County where he mocked the threat of measles. As the former leader of Children’s Health Defense, an anti-vaccine advocacy group, Kennedy promoted vaccine skepticism in the county during a period when trust in public health was already fragile. He has long promoted a disproven link between the MMR shot and autism, despite overwhelming scientific evidence that no such link exists.

Doctors on the Front Lines

At Lancaster General Hospital, physicians who had only read about measles in textbooks are now treating patients with the disease. Thirty-eight people have been hospitalized with measles-related complications, including pneumonia, brain swelling, electrolyte abnormalities, kidney and liver dysfunction, and blood count abnormalities.

“It feels surreal,” said Dr. Jeffrey Martin, chair of the Department of Family and Community Medicine at Lancaster General Health. “You’re treating something you probably never saw before.”

About 35% of the state’s cases this year have been diagnosed in children, who are among the most vulnerable to serious complications. And with schools set to reopen at the end of August, health officials fear the outbreak could accelerate.

“I don’t want to be alarmist, but I don’t think we should be minimizing the risk,” said Lancaster County Commissioner Alice Yoder, a nurse and former Lancaster General administrator. “There will be a large number of children coming together every day, and measles is just extraordinarily contagious.”

Yoder warned that official case counts likely understate the true scope of the outbreak. “Every case we have, we know there’s another 10 or 20 behind it,” she said.

The threat extends beyond Lancaster. Chester County, bordering Lancaster to the east, has seen 22 cases this year, and officials there say some residents with measles have refused to cooperate with contact tracing efforts. Lehigh County reported its first two cases in siblings who had recently traveled internationally, according to St. Luke’s University Health Network.

“The risk is real. This isn’t measles halfway across the country,” said Jennifer Janco, pediatrics chair at St. Luke’s. “And measles doesn’t care about county lines.”

A National Crisis

The Pennsylvania outbreak is part of a broader national resurgence. The U.S. is experiencing its worst measles year since 1991, with 2,318 confirmed cases nationally as of late July — already surpassing the 2,289 cases reported for all of 2025. The country is on the verge of losing its measles elimination status, which was declared in 2000, as CBS Pittsburgh reported.

Dr. Amesh Adalja, an infectious disease doctor in Pittsburgh and senior scholar at the Johns Hopkins Center for Health Security, warned that the outbreak could reach western Pennsylvania at any time.

“I think it’s only a matter of time before there are cases in Pittsburgh,” Adalja told CBS Pittsburgh. “It could already be in Allegheny County and Pittsburgh and just hasn’t been diagnosed.”

Adalja expressed frustration at the preventable nature of the crisis. “Our people are sliding backwards and choosing to turn away from a technology that kept everyone safe from measles for what? For no reason,” he said.

Policy Turmoil at the Federal Level

The outbreak has unfolded against a backdrop of federal policy upheaval. On August 10, President Trump signed an executive order calling for sweeping changes to childhood vaccine recommendations, including splitting the combined MMR vaccine into three separate shots and spacing out all childhood immunizations into separate medical visits, as The Guardian reported.

The order has no immediate legal effect on the public but is likely to put pressure on states to change school vaccine requirements. Medical experts warn the changes could create confusion and delay vaccinations.

“The main outcome will be ‘confusion for parents,’ with conflicting messages likely to mean delayed vaccinations,” said Dr. Aaron Milstone of the American Academy of Pediatrics.

Public health experts have raised alarms about the potential global impact. “There is a risk of the confused messaging affecting people outside the US,” said Prof Sir Andrew Pollard, director of the Oxford Vaccine Group. “Confidence in vaccines, and getting jabbed, is critical for the health of a population.”

Kennedy, who has fended off responsibility for the measles resurgence, has faced mounting criticism. The World Health Organization’s Director-General, Tedros Adhanom Ghebreyesus, accused the administration of ignoring decades of scientific evidence, as Al Jazeera reported.

“Vaccination policy should be guided by rigorous, independent and transparent review of the best available science, not by political influence,” Tedros wrote. “Delaying vaccines or separating doses unnecessarily does not make vaccination safer and can leave children unprotected.”

What’s Next

State health officials have administered more than 2,000 doses of the MMR vaccine this year, with more than 1,300 provided in June and July alone, according to WHYY. At Lancaster General, Martin says he’s seen increased interest in vaccination from some parents who had previously refused MMR shots for their children.

“There does seem to be a message that resonates here, and that is, if not for yourself, do it for your neighbor,” Martin said. “Get the immunization to protect the most vulnerable.”

With the Pan American Health Organization scheduled to assess the U.S. measles elimination status in November, and schools reopening in the coming weeks, the coming months will be critical. The outbreak serves as a stark reminder of how quickly a disease once considered eliminated can re-establish itself when vaccination rates fall and misinformation takes hold.

As Yoder put it: “The local government is typically a trusted place for people to go to. It would be so important and beneficial for us to come out stronger about the importance of vaccination.”