CDC counts second US measles death as Pennsylvania reports four

The US Centers for Disease Control and Prevention now counts two measles deaths in 2026, a second death reported on Tuesday, September 29, as outbreaks continue across the United States. Pennsylvania has separately reported four measles-associated deaths. The CDC has not identified the states where its two counted deaths occurred, leaving it unclear whether either is among Pennsylvania’s four.

The difference matters because the federal figure cannot be read as a complete accounting of Pennsylvania’s reported deaths. The CDC says its death total is subject to change as more information becomes available and reviews are completed. Neither the federal dashboard nor the Tuesday report establishes which individual deaths are included in the national count.

What the CDC’s measles figures show

The CDC dashboard lists 3,659 confirmed measles cases in the United States for 2026 as of September 24. Of those, 3,642 were reported by 47 jurisdictions, and 17 involved international visitors. It lists 40 new outbreaks this year and says 3,478 cases, or 95% of the total, were associated with outbreaks. An outbreak means three or more related cases.

Those case figures have a different cutoff from the death-count development reported on September 29. The CDC says its case page reflects confirmed cases notified to it by noon on Thursdays. State health departments may publish on different schedules, so a federal case total and a newer state update should not be treated as counts taken at the same moment.

How Pennsylvania’s count compares

Pennsylvania’s Department of Health reported 890 confirmed measles cases across 39 counties in its September 25 update. The state recorded 173 hospitalizations and four confirmed measles-associated deaths in 2026. It said the case total had risen by 55 since September 23. Those figures describe Pennsylvania’s state reporting, rather than a subset that can be identified in the CDC’s two-death figure.

The state has described how it investigated its measles-associated deaths. According to the health department, its review considered clinical evidence of infection, a positive laboratory test, exposure and supporting medical records, as well as whether an unrelated cause explained the death. It worked with county coroners on two of the investigations announced on September 15.

Pennsylvania said the two deaths announced that day involved unvaccinated people in Jefferson and Mifflin counties. It did not release identifying details. Health Secretary Debra Bogen said the department would work with partners to stem the outbreak and prevent further deaths. The state’s four-death total remained in its September 25 statewide update.

A Washington Post report on September 23 said the CDC had then added one death to its 2026 tally without identifying the person or state. At that point, the report said, no other state had publicly reported measles-associated deaths. That earlier reporting did not establish whether the federal death was one of Pennsylvania’s four; the newer federal total of two still does not resolve the overlap.

Why the outbreak remains a public health concern

The CDC says measles spreads through the air when an infected person coughs or sneezes, and that people can become infected after being in a room where someone with measles has been. It says two doses of the measles, mumps and rubella vaccine are 97% effective at preventing measles. Pennsylvania’s September 25 update said four people among its reported cases had been vaccinated, less than 1% of its total at that point.

Measles was declared eliminated in the United States in 2000, according to the CDC. Elimination does not mean imported infections and outbreaks cannot occur: the agency says infected travelers can bring the virus into communities where people are not protected. It reports that national MMR coverage among kindergartners fell from 95.2% in the 2019–20 school year to 92.4% in 2025–26, below its 95% target.

The immediate unanswered question is how the CDC classified Pennsylvania’s four reported deaths when it arrived at a national total of two. The public records reviewed do not provide a death-by-death reconciliation or identify the people in the federal tally. Until the agencies publish that detail, their figures can be reported side by side, but they cannot be added together or assumed to refer to separate deaths.