A healthcare worker at an Ebola treatment center outside Freetown, Sierra Leone on Dec. 22, 2014.
Photo by Baz Ratner/Reuters

Another American infected with Ebola

Updated

Another American healthcare worker has been infected with Ebola and will be admitted to a special unit at the National Institutes of Health on Friday, the NIH says.

“The individual was volunteering services in an Ebola treatment unit in Sierra Leone and will be transported back to the United States in isolation via a chartered aircraft,” the NIH said in a statement.

“The individual will be admitted and treated at the NIH Clinical Center Special Clinical Studies Unit, a high-level containment facility which is one of a small number of such facilities in the United States. No additional details about the patient are being shared at this time.”

RELATED: Last Ebola patient in Liberia discharged

It’s the same unit where nurse Nina Pham was treated and where a doctor and a nurse who were suspected of having been exposed to Ebola - but who both escaped infection - were kept under watch.

Andrea Mitchell Reports, 3/2/15, 12:45 PM ET

Ebola survivor Nina Pham to file lawsuit against Texas Health Resources

The Dallas Morning News’ Jennifer Emily talks about her exclusive interview with Nina Pham, the Texas nurse who contracted Ebola while caring for victim Thomas Eric Duncan. Pham has filed a lawsuit against Texas Health Resources for “corporate neglect.”
Eight Americans, including seven health care workers, have been infected with Ebola. All have survived. They include medical missionaries Dr. Kent Brantly and Nancy Writebol, both treated at Emory University Hospital and Dr. Rick Sacra, treated at the University of Nebraska; Dr. Craig Spencer, infected in Guinea and treated at Bellevue Hospital in New York; and nurses Pham and Amber Vinson who were infected while treating Thomas Eric Duncan, a Liberian traveler who turned up sick in Dallas.

Ebola’s infected more than 24,000 people in West Africa and killed 10,000 or more of them.

This article originally appeared at NBCNews.com

Ebola

Another American infected with Ebola

Updated