American Ebola patient arrives at National Institutes of Health; is in serious condition

BETHESDA, Md. (AP) -- Doctors say an American healthcare worker who contracted Ebola while volunteering in a Sierra Leone treatment unit is in serious condition.

Officials said Friday that the patient arrived safely Friday at the National Institutes of Health's hospital in Maryland. Doctors evaluated the patient after the person was flown in isolation from Sierra Leone on a chartered plane and admitted at 4:44 a.m. The patient's name, age and gender were not released.

The patient is the 11th person with Ebola to be treated in the U.S. and the second admitted to the NIH Clinical Center. It has one of the few specialized isolation units nationwide set up to treat Ebola patients.