A girl born in Pennsylvania with a rare neurological disorder called Amish lethal microcephaly died of measles at around 6 weeks of age, the Lancaster County coroner said Friday.

The CDC is refusing to count the deaths of two children in Pennsylvania from measles, directly contradicting the state's health officials.

The agency’s weekly update escalates a political fight after Pennsylvania said two deaths had been caused by the virus.

Health and Human Services Secretary Robert F. Kennedy Jr. acknowledged Friday that measles caused the death of an infant in Pennsylvania, after previously questioning the state’s reporting of two measles-related deaths amid a growing outbreak.

A county coroner confirmed the death. Health Secretary Robert F. Kennedy Jr. had raised the possibility Josh Shapiro's staff made it up.

Pennsylvania is one of three states, alongside South Carolina and Utah, that have been hit the hardest by measles this year

What’s happening with measles in Pennsylvania? There is currently a disagreement between local health officials and the feds over whether there are one, two, or no measles deaths in the ongoing outbreak there.

Infectious disease outbreaks can move fast and are tricky to predict. A new forecasting tool from the CDC helped South Carolina through a historic measles outbreak and could apply to future outbreaks.

Health officials have confirmed three new measles cases connected with an outbreak of the virus at a metro Atlanta day care.