Historically, state health departments determine cases and deaths, not the CDC.

The Centers for Disease Control and Prevention is excluding two measles deaths reported by Pennsylvania health officials last week from its latest update of national measles data. The move publicly challenges the accuracy of the state’s death determinations in an extraordinary move that breaks precedent that states are the arbiters of case and death determinations, not the CDC.

The New York Times reported Monday that the CDC’s new director, Erica Schwartz, is behind the decision. Schwartz—less than a month into the job—reportedly ordered CDC staff to add an unusual statement onto the CDC’s website for measles surveillance data. The statement notes that the update will not include the deaths reported by Pennsylvania and continues: “At this time, available information does not establish whether measles caused or contributed to the deaths or whether the individuals died from other causes while infected with measles.”