Pennsylvania measles surge prompts parents to vaccinate early and avoid Lancaster County

Pennsylvania's measles outbreak has infected 767 people this year and hospitalized 45 minors, with four deaths recorded in Lancaster, Jefferson and Mifflin counties. In the densely populated Philadelphia region, parents are accelerating immunizations, including offering a first dose to infants six months old in affected counties, and postponing daycare enrollment. Many are also avoiding Lancaster County and crowded gatherings such as festivals.

Health officials warn that vaccination rates in some kindergartens have fallen below the 95% herd-immunity threshold. The CDC notes more than 3,100 measles cases nationwide, underscoring the risk of cross-border spread.