Husband says Ebola patient sounds stronger everyday

One of the American Ebola patients, Nancy Writebol, is talking to her family on the phone and through Skype.
Writebol is at Emory University Hospital.  She and Dr. Kent Brantly are recovering in the hospital's isolation unit.  Officials say they contracted Ebola while serving overseas.  
Her husband, David Writebol, said her voice sounds stronger.
"Each time I talk to her I get a sense her voice is clearer and brighter so I’m imagining she's getting stronger," he said.
Writebol spoke to Channel 2’s Erica Byfield on Skype from North Carolina. Doctors quarantined him there just in case he has Ebola.
"She tells me she is feeling better and getting stronger," he said.
For the first time since Nancy Writebol’s arrival at Emory Hospital, Channel 2 heard from one of her sons.
"She definitely knows there are tens of thousands, if not millions, of people praying for her," said Jeremy Writebol.
The virus has killed more than 1,000 people in West Africa.
The Center for Disease Control and Prevention now has 55 employees on the ground and an additional 350 workers helping to keep the outbreak from spreading to the United States.
Many of those workers are handling logistics, communications and management from the agency's Emergency Operations Center.
At Emory University Hospital the focus is on recovery for both American aid workers.
"The medical staff there has been incredible. They have been compassionate, professional, and that really has been the key I think in helping mom recover," said Jeremy Writebol.
The CDC is fighting Ebola in four West African countries.
The largest number of cases is in Liberia.
The agency's ultimate goal is to have 60 workers in the affected countries continuously.
CDC leaders believe the key to stopping the spread of Ebola is figuring out how people got it.
A number of workers in West Africa are now focused on something they call "contact tracing.”