A 40‑year‑old woman died on Saturday in Jefferson County, Pennsylvania, the third death linked to the state’s ongoing measles outbreak.

Officials say the woman was unvaccinated and had underlying health conditions that may have worsened the disease’s impact.

She was admitted to a local hospital with severe complications and died after a brief course of treatment.

A third death marks a grim reminder that measles is back.

The coroner’s office confirmed the death after an autopsy found evidence of measles‑related encephalitis. Local health authorities noted the patient had not received a routine dose of the measles, mumps and rubella vaccine series. The hospital’s epidemiology team recorded the case as part of the state’s active outbreak surveillance.

Health officials in Pennsylvania have urged residents to seek vaccination and to follow guidance from the Centers for Disease Control and Prevention. The state health department has increased outreach to communities with low vaccination rates and is coordinating with local hospitals to improve case reporting. An emergency response plan that was activated earlier this year is now being reviewed for effectiveness.

The outbreak began in early 2026, with cases first identified in January in several counties. Since then, over 400 confirmed infections have been reported across the state, primarily in unvaccinated clusters. Two infant deaths in August were the first fatalities in the current wave.

Measles was declared eliminated in the United States in 2000 after a national vaccination campaign. However, pockets of low immunity persist, and recent global outbreaks have seeded new cases in the US. The current wave is linked to imported cases from international travel and to a community with high vaccine refusal rates.

Public‑health experts warn that the rising death toll underscores gaps in routine immunisation coverage. They stress that measles is highly contagious and can lead to severe complications, particularly in adults with pre‑existing conditions. The state’s public‑health budget has been earmarked to expand vaccine clinics and to fund educational campaigns.

In response, the state health department has scheduled a series of mobile vaccination drives across the most affected counties. A task force of epidemiologists, clinicians and community leaders will meet next week to evaluate containment strategies. Residents are advised to contact their primary care provider if they suspect measles symptoms or have not received the vaccine series.

With the third death confirmed, Pennsylvania’s outbreak remains a pressing public‑health challenge that could widen if vaccination gaps are not closed.