WBUR 9/5/14: Mass. Doctor With Ebola In Stable Condition. A doctor who became infected with Ebola while working in Liberia is sick but in stable condition and communicating with his caregivers at the Nebraska Medical Center, officials said Friday. Dr. Rick Sacra, 51, is being treated at a 10-bed special isolation unit, the largest of the United States’ four. It was built to handle patients with highly infectious and deadly diseases, according to Dr. Mark Rupp, chief of the infectious diseases division at the center.