Ebola Victim's Son: Mom is 'Getting Stronger and Stronger'

Nancy Writebol, one of the American aid workers who contracted the Ebola virus in Liberia, is getting stronger every day, her husband David told CNN's Elizabeth Cohen.

Writebol remains in isolation at Emory University Hospital; David is under quarantine after returning from Africa, but is showing no signs of the virus.

On "New Day" Thursday,  Nancy's son Jeremy, who has seen his mom through glass windows in the special isolation unit, reported that he is also encouraged by her progress.

"I know that each day since she's been here at Emory there's been progress forward in her condition and care and she's getting stronger and stronger, which is something we really praise the lord for," he said.

His mom received two doses of the experimental drug ZMapp before she was stable enough to be evacuated back to the U.S.,  but Jeremy said he doesn't know more about how his parents decided for Nancy to use the serum.

"I know she was very sick and needed some help and that was made available and they went  forward with it," he said.

Though he partly thanked ZMapp for his mom's progress, Jeremy cited the "incredible" medical staff at Emory as "the key" to helping Nancy recover.

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