Pennsylvania Confirms Fifth Measles-Associated Death Amid Growing US Outbreak

Pennsylvania has confirmed its fifth measles-associated death of the year as infections approach 1,000 amid a rapidly expanding outbreak across the state. The Pennsylvania Department of Health announced on Wednesday that an unvaccinated resident of Lancaster County who tested positive for measles had passed away. The department confirmed that the death was reported to the United States Centers for Disease Control and Prevention (CDC).

To date, the state has recorded 943 confirmed measles cases across 39 counties in 2026, including 40 new cases since September 28. At least 176 individuals have required hospitalization. The United States is currently experiencing its worst measles outbreak since 1991, accompanied by multiple deaths over the past few years. Although measles was declared eliminated in the US in 2000, the highly contagious disease has resurged, a trend experts attribute partly to rising vaccine skepticism.

This latest fatality marks the third measles-associated death reported in Lancaster County this year. Situated in south-central Pennsylvania, Lancaster County forms the heart of Pennsylvania Dutch Country and hosts the nation's oldest Amish and Mennonite communities, both of which feature under-vaccinated populations. Pennsylvania reported its initial two measles-associated deaths in August, marking the first measles-related fatalities in the state in 35 years. Since then, confirmed infections have more than doubled.

The escalating outbreak has led the administration of Governor Josh Shapiro to ramp up vaccination campaigns and public health outreach. Protection is predominantly achieved through the measles, mumps, and rubella vaccine, known as the MMR shot. According to the Pennsylvania Department of Health, over 53,000 MMR vaccine doses were administered statewide in September, more than double the volume distributed in a typical month. Health experts note that two doses of the MMR vaccine provide approximately 97 percent effectiveness against measles.

On Tuesday, the CDC confirmed two measles-related deaths in its national statistics, though the agency did not specify the locations. This federal tally has sparked a dispute between Governor Josh Shapiro and US Health Secretary Robert F Kennedy Jr regarding the classification of measles deaths. Pennsylvania utilizes the designation "measles-associated" when a confirmed measles patient dies within 30 days of symptom onset, barring death from an unrelated event.

However, Robert F Kennedy Jr, a noted vaccine skeptic, accused Governor Josh Shapiro of politicizing the deaths and initially questioned the link between measles and the two fatalities reported by the state in August. Infectious disease experts caution that this disagreement places the CDC at odds with traditional measles tracking methodologies. Epidemiologists have explained to Al Jazeera that tracking measles-associated deaths remains a standard practice employed by both the World Health Organization and the CDC.

Meanwhile, Pennsylvania officials continue to pursue additional federal support to combat the outbreak. Earlier this month, the state requested an Epi-Aid investigation from the CDC—a tool deployed for urgent disease outbreaks and disasters—as transmission persists.