Pennsylvania health officials confirmed a fourth measles-related death in an 18-year-old Mifflin County resident, marking the state’s first measles-associated deaths in 35 years. The patient suffered from a severe neurological complication, as state case counts approach 700 amid declining vaccination rates and public health warnings.
Pennsylvania’s ongoing measles outbreak has claimed its fourth life, state health officials announced. The most recent fatality involved an 18-year-old resident of Mifflin County who was unvaccinated against the virus, according to state health officials. The Mifflin County coroner’s office detailed that the teenager died from acute disseminated encephalomyelitis, described as a rare and severe neurological complication involving inflammation in the brain.
The death marks a grim milestone for the state, which is enduring its first measles-associated fatalities in 35 years. State data shows that nearly 700 cases have now been reported across 38 counties this year, with roughly 100 of those infections occurring in a single week. Across the country, the United States is experiencing its worst year for measles since 1991, logging seven reported measles-associated deaths over the past two years—a figure that surpasses the combined total recorded over the previous three decades.
County-by-County Breakdown of the Outbreak’s Toll
The four deaths reported in Pennsylvania over the past month span multiple age groups and counties, drawing rigorous investigations from state and local coroners. The state Department of Health defines a measles-associated death based on clinical evidence, a positive laboratory test, and whether the patient died within 30 days of symptom onset, alongside a review of medical records and exposure history.
Mifflin County: An unvaccinated 18-year-old resident died from acute disseminated encephalomyelitis, according to the county coroner’s office. Earlier on Tuesday, the health department issued an alert warning residents who visited an ALDI supermarket in Burnham that they may have been exposed to an individual who tested positive for the virus.
Jefferson County: A 40-year-old woman with asthma and severe lung disease died on Saturday from measles complications, as the county coroner previously reported. She was also unvaccinated.
Lancaster County: Two infant deaths occurred last month. One involved a 6-week-old baby whose death was attributed to measles. The second involved a newborn who died shortly after birth; while the coroner found evidence of the virus in the infant’s lung tissue, the primary cause of death was determined to be an internal hemorrhage and a traumatic rupture of the spleen. Because the first dose of the MMR vaccine is typically administered around age one, neither infant was eligible for inoculation.
Public Health Warnings and Federal Discrepancies
State health authorities have tied the surging numbers directly to falling vaccination rates that sit below the 95% threshold required to prevent outbreaks. Two doses of the measles, mumps, and rubella vaccine provide 97% protection, typically for life. State Health Secretary Dr. Debra Bogen emphasized the urgency of immunization as the outbreak expands.
“My thoughts are with the two families who lost loved ones to this highly contagious virus, as Pennsylvania faces the worst measles outbreak in more than three decades.”
Despite the state’s tally, a reporting gap has emerged at the federal level. The Centers for Disease Control and Prevention confirmed 3,294 nationwide measles cases as of September 10, but its official website does not yet list any 2026 death records attributing fatalities to measles. While state officials report submitting daily death records to the CDC’s National Center for Health Statistics—including records for the recent measles-associated deaths—CDC Director Erica Schwartz stated that Pennsylvania had not requested direct federal assistance for its outbreak, though the state health department maintains it shares a strong working relationship with federal professionals.
The public health crisis has also sparked broader friction. Last month’s infant deaths in Lancaster County triggered a wave of online misinformation and political conflict between Pennsylvania Gov. Josh Shapiro and Health Secretary Robert F. Kennedy Jr. Shapiro publicly accused Kennedy of promoting falsehoods regarding vaccines, while Kennedy questioned whether the infant deaths might have been fabricated and suggested political motives behind the Governor’s statements.
Unvaccinated woman is third measles-related death in Pennsylvania
Medical professionals note that anti-vaccine arguments frequently claim positive measles tests do not prove the virus caused death when secondary conditions are present. However, physicians maintain that measles remains the underlying driver in these instances, as the patients would not have succumbed without contracting the primary infection.
Guidance for Potentially Exposed Residents
Health officials continue to urge anyone experiencing symptoms or believing they experienced a public exposure to take immediate precautions. Residents can contact a healthcare provider or reach out to the Pennsylvania Department of Health’s toll-free hotline at 877-PA-HEALTH (877-724-3258) for guidance.
Photo: https://www.cdc.gov/measles/data-research/index.html3rd measles-related death reported in Pennsylvania
Dr. Priya Deshmukh
Senior Editor, Health
Dr. Deshmukh is a practicing physician and renowned medical journalist, honored for her investigative reporting on public health. She is dedicated to delivering accurate, evidence-based coverage on health, wellness, and medical innovations.
