Texas Health Presbyterian Hospital Dallas

Texas Health Presbyterian Hospital Dallas didn't provide any further details or respond to questions about Duncan's health on Saturday. The hospital has previously said Duncan, who was being kept in isolation, was in serious but stable condition. Duncan traveled from disease-ravaged Liberia to Dallas last month before he began showing symptoms of the disease that has killed some 3,400 people in West Africa. Health officials said Saturday that they are still monitoring about 50 people who may have had contact with Duncan for signs of the deadly disease. Among those are nine people who are believed to be at a higher risk. Thus far none have shown symptoms. Included in the group being monitored are people who later rode in the ambulance that took Duncan to the hospital last Sunday, said Dr. Tom Frieden, the director of the Centers for Disease Control and Prevention.