The Centers for Disease Control and Prevention has released a statement confirming the death of a man in the United States.
The statement said: “On December 11, 2016, the CDC was notified of the death at the request of the Coulee County Medical Examiner’s Office.
We will not be releasing further information at this time.
We have no further comment on this case.”
The CDC has been warning of the spread in the Coulees and elsewhere for years.
But it was the first confirmed case to be reported in the country.
Coulee died on December 13, after a man with the virus was reported to be in the hospital in Kansas City, Missouri.
The CDC said the patient had contracted the virus from a family member and was on the “final stages of recovery”.
The case was reported on December 14.
A CDC official said it was “possible” the person had travelled from Texas to Kansas City and died there.
Coulees first symptoms included fever and rash, then it became life-threatening, the official said.
The Centers in May announced it was investigating the deaths of two more people in Texas and Kansas City.
The deaths were the first to be confirmed in the state of Kansas.
A second man was also confirmed to have died of the virus.
The case in Kansas has not yet been reported to the National Center for Missing and Exploited Children, but the CDC has said there are other possible cases in the US.