HARRISBURG, PENNSYLVANIA / RankWire.AI / – As measles cases continue to surge nationwide in 2026, Pennsylvania has reported a total of 943 confirmed infections spread across 39 counties, according to the latest update on the outbreak. The Pennsylvania Department of Health documented 176 hospitalizations and five deaths associated with measles as of Sept. 30. Since the last report on Sept. 28, an additional 40 cases have been identified, indicating ongoing transmission throughout the state. Authorities are monitoring cases, hospitalizations, fatalities, vaccination statuses, and affected areas via Pennsylvania’s measles dashboard.
The department confirmed that the fifth death involved an unvaccinated resident from Lancaster County who tested positive for measles. No further details were released, citing privacy protections. The state classifies this fatality as measles-related under its reporting standards. Pennsylvania has now recorded five such deaths during the 2026 outbreak. The department also notified the Centers for Disease Control and Prevention about this death as part of the national measles surveillance effort.
Vaccination data reveal that just four of the 943 confirmed cases involved individuals who had received appropriate immunizations for their age, accounting for less than 1% of the total cases. The vaccinated patients include three adults and one child from Centre, Jefferson, Lancaster, and Lycoming counties. State health officials advise residents lacking documented immunity to contact a healthcare provider or pharmacist regarding measles, mumps, and rubella vaccinations.
Increase in Vaccination Efforts Across Pennsylvania
During the outbreak, vaccination activities have notably increased. In September alone, Pennsylvania healthcare providers administered over 53,000 MMR doses, surpassing the usual monthly figure of approximately 25,000. August saw more than 49,000 doses administered. Additionally, state health personnel have delivered over 5,500 doses at 180 pop-up clinics since late April when the outbreak started. Throughout 2026, nurses have administered more than 8,500 MMR doses through these clinics and state health centers.
The MMR vaccine offers protection against measles, mumps, and rubella. According to the Centers for Disease Control and Prevention, two doses of the vaccine are 97% effective at preventing measles, while a single dose provides 93% effectiveness. Pennsylvania officials state that individuals with two documented doses do not require additional vaccination for routine immunity. Adults with only one dose or lacking vaccination records should consult a healthcare professional. The state makes vaccines accessible through providers, health departments, state health clinics, and participating community programs.
Nationwide Rise in Measles Cases During 2026
Measles spreads via the air when an infected individual breathes, coughs, or sneezes. The virus can remain infectious in the air and on surfaces for up to two hours. Symptoms often start with fever, cough, runny nose, and red, watery eyes, followed by a rash that typically begins on the head and moves downward a few days later. Signs can appear from seven to 21 days post-exposure, and infected persons can transmit the virus before the rash emerges.
The Pennsylvania outbreak is part of a broader increase in U.S. measles activity during 2026. As of Sept. 24, the CDC confirmed 3,659 cases nationwide across 47 reporting jurisdictions and including international visitors. The agency noted that 95% of these cases are linked to outbreaks. In comparison, the U.S. recorded 2,289 confirmed cases throughout 2025. The CDC emphasizes that measles remains highly contagious and that the United States eliminated continuous domestic transmission in 2000. Pennsylvania reports its figures separately due to differing reporting schedules between the state and federal authorities.