Health 14 sources · over 3 days Latest coverage 15 Sept 2026, 7:08 pm UTC

Pennsylvania Faces Four Measles Deaths Amid Largest US Outbreak in Decades

A growing measles outbreak in Pennsylvania has now caused four deaths, raising alarm among health officials as infections reach levels not seen in the US since the early 1990s.

By Isabel Navarro · First published 15 Sept 2026

In brief

  1. A measles outbreak in Pennsylvania has resulted in four confirmed deaths, including two infants, a woman, and a teenager.
  2. The outbreak began earlier this year and has now led to more than 670 reported cases across the state.
  3. The most recent victims were a 40-year-old unvaccinated woman with existing health conditions and an 18-year-old from Mifflin County.
  4. Health officials are concerned about the rapid spread and the unusually high number of severe cases and hospitalizations.
  5. Authorities are monitoring for further cases and discussing changes in how measles deaths are tracked and reported.
Pennsylvania Faces Four Measles Deaths Amid Largest US Outbreak in Decades
Source: The New York Times

Timeline · 6 moments

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Third measles death in Pennsylvania: 40-year-old woman

The New York Times ↗

Pennsylvania health department reports 676 measles cases

ABC Top Stories ↗

Officials confirm third measles death amid outbreak

STAT News ↗

Authorities discuss changes in counting measles deaths

Guardian Health ↗

Fourth measles-related death confirmed in Pennsylvania

ABCNews.com ↗

Fourth victim is an 18-year-old in Mifflin County

STAT News ↗

How it started

The measles outbreak in Pennsylvania began earlier in the year, quickly drawing notice from health officials due to its rapid spread and severity. Initial cases were identified in various counties, raising concerns because measles is highly contagious and can be especially dangerous to those who are unvaccinated or have underlying health problems.

As the number of infections climbed, the state started to see more severe outcomes. The first deaths linked to the outbreak were reported among infants, highlighting the risk to vulnerable groups. Officials urged the public to get vaccinated and increased their monitoring efforts.

How it unfolded

By mid-September 2026, the outbreak had already become the worst in the US in decades. On September 13, a 40-year-old unvaccinated woman from Jefferson County died from measles complications. She had asthma and lung disease, which likely contributed to the severity of her illness.

The same week, state and county officials confirmed that this was the third measles-related death in the ongoing outbreak, following the deaths of two infants earlier in the year. The number of reported infections reached 676, with more than 120 people hospitalized due to severe complications.

On September 14, state health authorities confirmed a fourth death, this time involving an 18-year-old from Mifflin County. This marked a sharp increase in both fatalities and public concern. Discussions also began about changes in how measles deaths are counted, with federal and state officials using slightly different methods to track the impact.

International health officials and the CDC began to pay closer attention, given the scale of the outbreak and its implications for public health across the US.

Where it stands

As of now, Pennsylvania has recorded four deaths related to measles in the current outbreak, making this the worst year for the disease in the state since 1992. More than 670 cases have been confirmed, and hospitals continue to treat a significant number of severe cases.

Health authorities are still investigating the full scope of the outbreak, including the potential for further deaths and the need for expanded vaccination campaigns. The public remains on alert as officials try to contain the spread.

What to watch

Officials are monitoring for new cases and are expected to update protocols for tracking and reporting measles deaths. There may also be changes in vaccination requirements or public health guidance as the outbreak continues to evolve.

Written from 14 outlets' coverage of this story. Every timeline entry links to the original report.

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