Pennsylvania measles outbreak spurs early vaccinations as cases top 767
With 4 deaths and 45 hospitalizations, parents are vaccinating infants earlier and avoiding affected counties.
What to know
- Pennsylvania's measles outbreak has sickened 767 people in 2026 with 4 deaths and 45 hospitalizations, the worst outbreak in three decades.
- State health officials now recommend a vaccine 'dose zero' for infants as young as six months in affected counties, earlier than the typical one-year-old schedule.
- About 40% of kindergartens in the Philadelphia region dropped below the 95% herd immunity threshold, leaving communities increasingly vulnerable.
- Concerned parents are responding by vaccinating early, avoiding affected areas, and taking additional precautions like mask-wearing to protect unvaccinated children.
Josh Shapiro Pennsylvania Governor
Robert F. Kennedy Jr. U.S. Health SecretaryLeah Santos Nurse and parent
How it unfolded 2 developments, newest first · click a bar or a number to jump articlesposts
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Hundreds of Philadelphia-area kindergartens fall below herd immunity threshold
An Inquirer analysis of state data found that about 40% of kindergartens across Philadelphia and four surrounding suburban counties dropped below the 95% vaccination rate needed for herd immunity in the 2025-26 school year, up from about a third the previous year.
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Pennsylvania health officials urge early measles vaccinations as outbreak grows
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Parents adopt precautions to protect children from measles — Philadelphia-area parents respond by vaccinating children early, delaying daycare enrollment, and avoiding contact with people who have traveled to Lancaster County. Some take additional precautions like continued mask-wearing during commutes.
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Pennsylvania health officials recommend early measles vaccinations — State health officials recommend a 'dose zero' vaccine for children as young as six months in affected counties, departing from the typical recommendation of vaccination at one year old.
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Pennsylvania measles outbreak reaches 767 cases with 4 deaths
State officials report the outbreak has sickened 767 people, hospitalized 45 children under 18, and caused four deaths: two infants in Lancaster County, a 40-year-old in Jefferson County, and an 18-year-old in Mifflin County. Chester County has the most cases in the Philadelphia region with 65.
“I have a child to protect at all costs. So I'm making sure I'm not in contact with anyone who's been traveling out to Lancaster.”
— Leah Santos, Nurse and parent · source -
first by Philadelphia Inquirer, 4d ago
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Measles outbreak grows in Lancaster County — A measles outbreak spreads through Lancaster County, Pennsylvania, prompting increased attention from nearby residents and families concerned about transmission.