Pennsylvania says two unvaccinated Lancaster County residents died from measles-associated illness in August — the state's first measles deaths in 35 years. The CDC says, officially, that the national death count for 2026 is still zero.

The gap between those two claims has opened into a public fight between the nation's top health agency and a state health department, with Health and Human Services Secretary Robert F. Kennedy Jr. — a longtime vaccine skeptic — publicly suggesting Pennsylvania's numbers were, in his words, possibly "fabricated by one of the Governor's hopeful staffers."

Dueling Accounts

New CDC Director Erica Schwartz, sworn in last month, ordered the two Pennsylvania deaths excluded from the agency's official tally. In a statement, the CDC said "available information does not establish whether measles caused or contributed to the deaths or whether the individuals died from other causes while infected with measles."

Pennsylvania is standing by its findings. Health Secretary Debra Bogen said state epidemiologists thoroughly investigated both cases and reported them to federal response teams through the normal channels, and defended the underlying science regardless of the tally dispute: "the MMR vaccine is safe and provides the best protection we have against measles," Bogen said.

"AVAILABLE INFORMATION DOES NOT ESTABLISH WHETHER MEASLES CAUSED... THE DEATHS" — CDC STATEMENT

The standoff lands amid the worst US measles outbreak in 35 years, with case counts climbing through the summer, driven largely among unvaccinated communities. It also follows a public spat between Kennedy and Pennsylvania Gov. Josh Shapiro, who has linked Kennedy's vaccine rhetoric to the state's outbreak. Earlier this month, President Trump signed an executive order directing federal health agencies to move toward splitting the combined measles-mumps-rubella (MMR) shot into three separate doses, a long-sought goal of vaccine skeptics that mainstream pediatric groups say has no basis in safety data and could reduce already-falling vaccination rates further.

For now, the practical stakes of the dispute are mostly about how the outbreak gets counted, not how it's treated — Pennsylvania's health department says it is not changing its own public reporting regardless of what the CDC's national dashboard shows. But public-health researchers warn that a federal agency publicly second-guessing a state's death count, in the middle of the worst outbreak in a generation, risks further eroding public trust at exactly the moment officials are trying to push vaccination rates back up.