Union Community Care clinics administer about 450 measles shots
At a vast outdoor market in Ephrata on a recent Friday, Amish and Mennonite shoppers in conservative dress mingled with shoppers from the wider public, buying pumpkins, mums, fry pies and squash alongside sports jerseys and Barbie accessories. Such interactions are routine in Lancaster County, the central Pennsylvania county of half a million people that is home to the largest Amish population in the United States — and the epicenter of the nation’s worst measles outbreak in 35 years. “We are all interconnected,” said Dr. Diego Hijano of St. Jude Children’s Research Hospital.
The nonprofit Union Community Care, which has clinics in the city of Lancaster and outlying towns along with a mobile unit running a “Plain Healthy” outreach to the Amish and to Mennonites, has held small-scale vaccine clinics to reach Plain populations, resulting in about 450 measles shots. “That’s hopefully made a significant impact,” said Dr. Anne-Marie Derrico, the organization’s chief medical officer. The clinics are also vaccinating infants earlier than normally scheduled, as health experts advise in areas experiencing measles outbreaks.
Lauren and Mason Spence brought their 10-month-old son, Bowen, to a clinic recently for his first dose of the MMR vaccine, short for measles, mumps and rubella. The “English” family frequently goes to public places, including farmers markets. “It’s scary,” Lauren Spence said. “It’s spreading quick.”
Pennsylvania has recorded more than 1,350 measles cases this year, more than a third of them in Lancaster County alone, according to state figures. The state has recorded three measles-associated deaths in Lancaster and two in other counties. Community leaders say that count is a significant undercount, since many people with measles never see a doctor. Measles has been officially considered “eliminated” from the United States since 2000, but rates among the general public are now falling and rates have long been low among the Amish, creating conditions that have allowed the highly contagious virus to spread here and beyond.
The outbreak has especially hit the “Plain communities” of Amish and conservative Mennonites, so named for their modest dress and limited use of technology. Vaccination rates, and attitudes about vaccines, range widely within those communities, but overall they are less likely to be vaccinated than the general population, due more to culture and habit than doctrine, community leaders and experts say. The Plain communities avoid such forms of civic engagement as holding public office, but they regularly shop and do business with their neighbors in a county where an urban core is ringed by suburban subdivisions abutting Amish farms. “There’s no way to imagine that this is going to be an isolated community,” Derrico said. “We have Plain patients coming to the city, we have patients in the city who don’t vaccinate, who are going to school, going to other programs with other children.”
Pennsylvania’s measles rates have declined from their September peak, but some doctors expect them to rise as winter brings more indoor gatherings. While most cases are mild, measles can cause serious and even fatal complications, such as pneumonia and encephalitis.
Attitudes toward vaccines in Plain communities have alternately warmed and cooled over time — most recently cooling in reaction to strict COVID-19 public health measures, according to community leaders and scholars. The outbreak is prompting many to accept the shots while reinforcing vaccine skepticism in others. Ephraim Zook, an Amish farmer, still opposes vaccines even after he and his wife nursed their young twins through the illness. “We just felt that measles is a natural thing,” he said. A Mennonite market vendor said his largely vaccinated community has had no infections. A Plain farmer said he got vaccinated after his adult siblings began getting measles — with vegetables to harvest and tobacco leaves to pick, “I thought, if I get it, I’m going to be done.” Most of those interviewed asked not to use their names, in keeping with Plain traditions of not calling attention to themselves.
Those who avoid vaccines usually are not driven by ideology, community leaders and experts say. “The overwhelming reason had nothing to do with being against vaccinations,” said Allen Hoover, an Old Order Mennonite and former administrator of the Parochial Medical Center in the town of New Holland. “It was simply, ‘Well, we never did before, and we came through all right.’” Hoover said the most effective strategy for medical workers is to encourage vaccination — not to push it aggressively — and that it takes time for outside professionals to build trust in Plain communities. Asked how long, he answered: “Twenty years.”
A cluster of Amish schools and individuals in New York is asking the U.S. Supreme Court to require their state to allow exemptions to school vaccine requirements on religious grounds, as Pennsylvania and most states do. But the wider Amish leadership has not presented vaccination as a religious issue, according to Steve Nolt, director of the Young Center for Anabaptist and Pietist Studies at Elizabethtown College in Lancaster County. “There’s nothing in Amish theology or historic documents that you can find that specifically addresses or is opposed to immunization,” Nolt said. About 45,000 Amish and 6,000 Old Order Mennonites live in and around Lancaster County, according to the Young Center; many rely on traditional remedies and visit doctors infrequently, Nolt said.
This year’s outbreak follows ones in 2025 in Mennonite communities in Texas and elsewhere across North America. Measles spreads easily when people who have it breathe, cough or sneeze, or through contaminated surfaces. “Measles is really the lion king of infectious diseases when it comes to transmission,” said Michael Osterholm, who directs the University of Minnesota’s Center for Infectious Disease Research and Policy. “No one in the United States of America who is susceptible to the measles virus, either having not been vaccinated or not having previously had it, should feel safe from measles. No one.”
The risk grows as vaccination rates decline. According to the Centers for Disease Control and Prevention, 92.4% of U.S. kindergarteners in 2025-26 received the required MMR shots, down from 95.2% in 2019-20. Pennsylvania’s kindergarten MMR vaccination rate fell to 93.2% last year. Lancaster County’s rate is 88%, with lower rates in the county’s religious and other private schools than in public schools, according to a review of state data by the Associated Press. Across the county and state, the share of students receiving religious or philosophical exemptions from at least one required vaccination has risen significantly. An outbreak is considered unlikely if a community holds a 95% MMR rate — the point at which enough people have immunity that measles no longer spreads easily, a condition known as “herd immunity.”
Berwood Yost, director of the Center for Opinion Research at Franklin & Marshall College in Lancaster, wrote in a recent commentary that declining childhood vaccination rates extend beyond any single group. “Though Plain communities are an easy and recognizable target, declining childhood vaccination rates in our county are not limited to the Amish,” Yost wrote. “Kindergarten vaccination rates have declined in every central Pennsylvania county since 2020.” A 2022 survey by the center found the vast majority of Mennonite families reported having their children vaccinated, compared with about 3 in 10 Amish families. Yost urged the public not to blame the Amish, or any group, for the outbreak: “Every one of us is susceptible to misinformation and confusing messages.”
Nolt said some anti-vaccine groups have targeted the Amish with their messaging. In 2021, Robert F. Kennedy Jr., who helped lead the anti-vaccine movement for years, spoke at a Lancaster County fair, alleging the government was trying to force the Amish to vaccinate. Kennedy, now U.S. health secretary, recently sparred with Pennsylvania’s Democratic governor, Josh Shapiro, over the extent of the outbreak. Further controversy ensued when the county coroner attributed the death of a measles-infected infant to a ruptured spleen, not the disease itself.
Lancaster County Commissioner Alice Yoder said public officials should unite behind the message that the vaccine is safe and effective and should encourage people to get it — an approach that succeeded during Pennsylvania’s last measles outbreak in 1991. “There were lines of people in the Plain community that would come and get vaccinated,” she said. Dr. D. Holmes Morton, who founded the Central Pennsylvania Clinic in Mifflin County — which treats Plain patients with genetic diseases — said the same is happening now: “We are having more success at having vaccine days.” Ultimately, getting the shot keeps everyone safer, said Hijano — “an act of love to your community. You will get protected yourself. But in truth, you are actually protecting everyone around you.”