Pennsylvania health officials confirmed the state’s fifth measles-associated death of the year on Wednesday, Sept. 30, 2026, as an outbreak that began in the spring climbed to 943 confirmed cases across 39 counties.
The person who died was an unvaccinated Lancaster County resident who had tested positive for measles, the Pennsylvania Department of Health said. Officials released no further details about the individual, citing privacy protections.
The death is the fifth Pennsylvania resident this year to meet the state’s definition of a measles-associated death. The fourth was reported two weeks before Wednesday’s announcement, as the outbreak worsened through the late summer and early fall.
A Federal Tally That Omits Pennsylvania
None of those five deaths appear in the federal count. Because President Donald Trump’s administration changed the method for reporting measles deaths, the Centers for Disease Control and Prevention (CDC) has not included the Pennsylvania deaths in its national tally. The CDC has recorded more than 3,600 measles cases nationwide in 2026.
That gap has hardened into a standoff. Earlier in September, Pennsylvania asked the CDC for emergency assistance with the outbreak, then warned that it could withdraw the request unless the agency publicly recognized the measles-associated deaths the state has reported. The dispute began after Robert F. Kennedy Jr., the U.S. health secretary and former head of an anti-vaccine advocacy group, publicly questioned whether deaths linked to measles outbreaks since he took office were caused by the virus or by another condition.
Nearly All Cases Among the Unvaccinated
The arithmetic of the outbreak is blunt. Of the 943 confirmed cases, only four have involved vaccinated people — less than 1 percent of the state’s total. The measles, mumps and rubella (MMR) vaccine prevents 97 percent of measles cases, and the virus is considered one of the most contagious diseases known to medicine.
Agricultural communities in Lancaster and Mifflin counties have stayed at the center of the spread. Beyond Pennsylvania, Utah, Florida, Virginia and Texas have each reported dozens of cases, according to tracking by Johns Hopkins University. The United States eliminated measles in 2000, and it is unclear whether that status can be preserved amid the current outbreaks.
A Vaccination Push in Farm Country
Since the outbreak started in late April, staff at state health centers have administered more than 5,500 MMR vaccinations through 180 pop-up clinics in affected communities, according to a statement issued Wednesday. “Dozens of additional vaccination clinics are planned for the coming weeks and months, depending on community interest and need,” the department said.
The scale of that effort has roughly doubled over the past three weeks. In Sept. 10 data, the state reported more than 4,100 MMR doses given at roughly 120 pop-up clinics, with 624 cumulative cases, 109 hospitalizations and 37 counties affected — including 30 new confirmed cases since its previous update on Sept. 8. Demand has surged well beyond the usual: at least 25,000 MMR doses are administered in a typical month in Pennsylvania, but more than 46,000 were distributed across the state in August. By the end of that month, the CDC had logged more than 2,900 cases nationally.
As of Monday, Sept. 28, Pennsylvania had recorded 40 new positive cases, bringing the outbreak to 943 cumulative confirmed cases, 176 hospitalizations and five measles-associated deaths across 39 counties. Health officials caution that daily totals can shift, but say the running numbers give residents and clinicians a sharper view of community transmission and help steer the state’s response. Residents can follow confirmed cases, hospitalizations, deaths, transmission and vaccination efforts on the Department of Health’s public dashboard.
Underneath the outbreak sits a slower trend. Vaccination rates among kindergarten-aged children, a closely watched indicator, have gradually declined, and experts argue that the Trump administration is fueling confusion and misinformation about vaccines among parents. For now, the state’s response rests on the clinics it keeps opening in Lancaster, Mifflin and the dozens of other counties where the virus has taken hold.