Measles exposure spurs vaccine debate
The gist
Pennsylvania confirmed 693 measles cases and four deaths among unvaccinated residents as of Sep 14, 2026.
The outbreak is testing kindergarten vaccination rates below the 95% safety threshold.
How it unfolded
- Aug 2026Allegheny County reported its first case tied to the current outbreak, when the county health department warned of a potential exposure at UPMC Children's Hospital's emergency department.
- Aug 27, 2026Two confirmed measles cases were diagnosed in Allegheny County, but the patients left the county afterward.
- Sep 14, 2026The Pennsylvania Department of Health had confirmed 693 measles cases across 38 of the state's 67 counties this year, including 133 hospitalizations and four deaths among unvaccinated residents, compared with 16 cases statewide in all of 2025.