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News
Pennsylvania's measles outbreak has surged to 731 confirmed cases and four deaths — all in unvaccinated individuals — making it the epicenter of the worst U.S. measles resurgence in decades. Lancaster County remains the hardest-hit area, while a political dispute between Governor Josh Shapiro and HHS Secretary RFK Jr. over how deaths are classified has added controversy to the crisis. Nationally, the U.S. has logged 3,294 measles cases in 2026 alone.
Pennsylvania's measles outbreak is showing no signs of slowing down. As of September 16, the state has confirmed 731 cases across 38 counties and 141 hospitalizations, with Lancaster County — historically a low-vaccination area — remaining the hardest-hit region. Four measles-associated deaths have now been reported, all in unvaccinated individuals, marking the most significant measles-related mortality the U.S. has seen in decades.
The outbreak has also ignited a political battle. Governor Josh Shapiro and HHS Secretary Robert F. Kennedy Jr. have publicly clashed over how measles deaths should be classified, with Kennedy asserting only one death was directly caused by measles. The CDC, meanwhile, has paused including 2026 deaths in its official tally while it reevaluates its classification criteria — a move critics say risks downplaying the severity of the crisis.
By the Numbers:
Why it matters: The U.S. measles elimination status — achieved 26 years ago — is now under serious threat, with a formal review scheduled for November. Declining vaccination rates, political disputes over public health messaging, and a proposed executive order to split the MMR vaccine into three separate shots are all compounding the risk of further outbreaks across the country.
