HARRISBURG, Oct. 17 -- Pennsylvania's Department of Health says measles has killed five people in the state. ABC News reports six, counted by local health officials. The CDC's national measles page, updated Friday, lists two deaths for the entire country.

The sixth is a 39-year-old unvaccinated woman from Franklin County, whose death the state is still investigating. A spokesperson for the county coroner's office put the primary cause at a "probable acute cardiac event due to possible complications of the measles," NBC News reported on Monday, and the state said it "is conducting a thorough review of the reported death." That review sits inside a standoff with the CDC over which deaths count, one that has run since the state announced it...