PA measles outbreak tops 1,000 cases, largest since disease was eliminated
Pennsylvania's measles outbreak has reached 1,066 cases, making it the largest outbreak in the United States since measles was declared eliminated in 2000, surpassing the previous record of 997 cases in South Carolina. The highly contagious virus has claimed five lives, including a newborn and a 6-week-old, all among unvaccinated individuals, and has resulted in 207 hospitalisations. This resurgence reflects declining vaccination rates nationwide and represents a significant public health crisis.
Of Pennsylvania's 1,078 total measles cases in 2026, the outbreak began in April, with the remaining 1,066 linked to the current outbreak and new cases continuing to emerge at a concerning rate, including 34 reported in just the past few days. Across the entire United States, there have been 3,887 measles cases this year, the highest since 1991, and experts expect the country to lose its official elimination status when reviewed by international health authorities in November. New York has also declared a State Disaster Emergency in response to its outbreak of 108+ cases, whilst health officials warn that autumn conditions could accelerate transmission further.
- Pennsylvania measles outbreak tops 1,066 cases, largest since disease's 2000 elimination.
- Five deaths recorded; all were unvaccinated, including two infants too young for jabs.
- 3,887 US cases in 2026, highest since 1991; elimination status may be lost.
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Measles is a highly contagious viral infection that was eliminated from the United States in 2000 through widespread vaccination programmes. The disease can cause serious complications, including brain inflammation and pneumonia, and can be fatal, particularly in young children. A resurgence in measles cases in recent years reflects declining vaccination rates across the country.
Pennsylvania is currently experiencing the largest measles outbreak since the disease's elimination, with over 1,000 cases reported. The outbreak has resulted in deaths amongst unvaccinated individuals, including infants, and hundreds of hospital admissions. Cases continue to emerge regularly across the state.
Measles outbreaks are occurring in multiple states, and public health authorities predict the United States will lose its official elimination status for the disease this year. The situation reflects broader concerns about vaccination coverage and has prompted emergency declarations in affected regions. Measles spreads through the air when infected people cough or sneeze, making it particularly difficult to contain in crowded settings.