Pennsylvania measles outbreak surpasses 1,000 cases, marking largest since 1991

Pennsylvania is currently grappling with a severe measles outbreak that has surpassed 1,000 confirmed cases, the highest number recorded in the United States since the disease was declared eliminated in 2000 and the largest since 1991. Health officials report 1,078 total cases for 2026, with the vast majority occurring since April. The surge has resulted in 207 hospitalizations and five tragic deaths, including two infants, an 18-year-old, a 20-year-old, and a 40-year-old. Notably, all five individuals who passed away were unvaccinated, highlighting the critical role of immunization in preventing severe outcomes. While the state continues to process backlogged data, the rapid spread of the virus underscores ongoing public health challenges. Officials emphasize that the two infants were ineligible for vaccination due to their age, further stressing the importance of herd immunity in protecting vulnerable populations from this highly infectious disease.