Measles outbreak
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The gist
Pennsylvania's measles outbreak has reached nearly 500 cases and two deaths. The deaths' cause is disputed, fueling a national partisan controversy.
Background
The measles outbreak in Pennsylvania began in the spring and has grown into one of the most significant in the state's recent history, with nearly 500 cases reported. It is part of a national surge in measles cases, which have hit their highest level in 35 years, driven by declining vaccination rates and vaccine hesitancy. The outbreak has become a political flashpoint, especially after the state reported its first two deaths from the virus, with disputes over whether measles actually caused them.
How it unfolded
- Spring 2026Measles outbreak begins in Pennsylvania, gradually spreading across 28 counties.
- Aug 27, 2026State health officials report 379 cases and update vaccination guidance, expanding recommendations for early immunization.
- Aug 28, 2026State announces two deaths in Lancaster County, the epicenter, though it is not yet clear if measles caused them. Pregnant women are among those sickened.
- Aug 30, 2026The Atlantic profiles a family at the center of the controversy, highlighting the dispute over the infant's cause of death.
- Sep 2, 2026Outbreak has gone viral nationally, with nearly 500 cases reported, and has become a partisan controversy over the cause of the deaths.
Who’s saying what
- Official
- Governor Josh Shapiro's administration says both deceased were unvaccinated and classifies the deaths as measles-associated.
- Coroner
- Lancaster County coroner's office says the infant tested positive for measles but died of a ruptured spleen, not measles.
- Public
- Anti-vaccine activists question whether measles truly caused the deaths, echoing similar reframing in previous outbreaks.
- Expert
- Public health experts emphasize measles is highly contagious and can cause severe complications, urging vaccination.
Still unverified
The exact cause of the two deaths in Lancaster County is disputed; the state classifies them as measles-associated, but the coroner's office says the infant died of a ruptured spleen. Whether measles directly caused these deaths remains unconfirmed.