Pennsylvania measles deaths intensify vaccine debate as outbreak spreads to 28 counties

The deaths of two unvaccinated residents amid Pennsylvania’s growing measles outbreak have reignited debates over vaccine policies and highlighted the resurgence of a disease once thought eliminated in the US.

The deaths of two unvaccinated Pennsylvania residents after measles infection have intensified concern over a disease once considered eliminated in the United States, while also fuelling a wider political dispute over vaccines and public-health messaging. State officials said the fatalities were the first measles-related deaths reported in the country this year and the first in Pennsylvania in more than three decades.

Lancaster County has become the centre of the state’s outbreak, with officials saying roughly half of Pennsylvania’s 393 confirmed measles cases this year have been recorded there. The Pennsylvania Department of Health said cases have now been identified across 28 counties, and about one in five patients has needed hospital treatment. Health officials also said none of the confirmed cases involved people who had received the full two-dose MMR series, the standard vaccine that protects against measles, mumps and rubella.

The infant death has drawn the most scrutiny. Reuters and other outlets reported that state officials initially did not disclose details, then later said one of the deaths involved a baby whose case is still under review by the county coroner. The Atlantic reported that the child’s family are Amish and had not vaccinated most of their children, though not because of an overt anti-vaccine campaign. Separate reports said Lancaster County Coroner Stephen Diamantoni identified a ruptured or lacerated spleen in the infant’s death and has not concluded that measles was the direct cause, leaving the state’s description of the case as measles-associated at the centre of a continuing dispute.

The controversy has spilled into a broader clash between Governor Josh Shapiro and Health and Human Services Secretary Robert F. Kennedy Jr., with Shapiro warning that false claims about vaccination can have deadly consequences. Kennedy has questioned the state’s account, while public-health experts continue to stress that measles is highly contagious and can lead to pneumonia, brain inflammation and death. Nationally, more than 2,700 measles cases have been reported this year, the highest annual total since the early 1990s, and experts warn that continued spread could threaten the country’s measles-elimination status.