Pennsylvania's Measles Outbreak Claims a Fifth Life as Cases Near 1,000

A Death Toll That Keeps Rising

Pennsylvania's measles outbreak has now claimed five lives. On September 30, the Pennsylvania Department of Health reported to the Centers for Disease Control and Prevention that an unvaccinated resident of Lancaster County tested positive for measles and has died. Officials did not release the person's age or other identifying details, citing privacy laws and the family's right to mourn privately.

The four other measles-associated deaths reported by Pennsylvania include an unvaccinated teen who lived in Mifflin County, a 40-year-old woman in Jefferson County, and two infants in Lancaster County. Every single fatality recorded in the state this year has involved an unvaccinated individual. The death toll reported in Pennsylvania is also the nation's highest since 1992.

The Scope of the Outbreak

The Pennsylvania Department of Health reported the fifth measles-associated death amid an ongoing outbreak that is on track to become the largest the US has seen in decades. There are now 943 confirmed measles cases across 39 counties, with 176 hospitalizations reported. Nearly 20% of people diagnosed with measles in the state have required hospital care.

Lancaster County, where about 40% of the state's measles cases have been concentrated, has remained at the epicenter. The outbreak is also expanding in other counties, including Chester County in suburban Philadelphia, which had reported 83 cases as of September 30, the third-highest countywide case count in the state. Nationwide, the CDC recorded 3,659 confirmed measles cases as of September 24, 2026, with Pennsylvania representing the state hardest hit by the nation's measles resurgence.

Vaccines Work — and the Numbers Prove It

Of the confirmed cases, only four were among vaccinated individuals, which is less than 1% of the total cases in Pennsylvania. Getting vaccinated remains the best protection against the measles virus; the vaccine is proven 97% effective at preventing measles for life after two doses. The virus itself is extraordinarily contagious. The measles virus spreads easily through respiratory droplets when someone breathes, coughs, or sneezes, and the virus can linger in the air and on surfaces for up to two hours after the infected person has left.

National vaccination rates among kindergarten children fell to 92.5% in 2025, below the 95% threshold that epidemiologists consider necessary to maintain herd immunity and protect individuals who cannot be vaccinated for medical reasons. That gap has had devastating consequences. More than 53,000 MMR vaccine doses were administered statewide in September alone, over double the usual monthly amount — a sign that the crisis is finally pushing more people toward protection.

A Political Fight Shadows the Public Health Crisis

A clash erupted between Pennsylvania's vaccine-promoting Democratic Governor Josh Shapiro and U.S. Health Secretary Robert F. Kennedy Jr., a Trump administration appointee, after Kennedy said in a social post the deaths "may even have been altogether fabricated." The CDC's public tracking of the measles death toll nationally currently shows only two deaths, reflecting decisions made under Kennedy's leadership. Pennsylvania's health department, however, has continued reporting its own figures independently to the CDC.

State health center staff have delivered more than 5,500 MMR vaccinations at 180 pop-up clinics since the outbreak began in late April, and dozens of additional vaccine clinics are scheduled for the upcoming weeks and months, based on community interest and need. With 943 cases and five deaths, Pennsylvania's outbreak is a stark reminder that measles is not a relic of the past — and that the decisions communities make about vaccination have life-or-death consequences that no political argument can erase.