The US doctor who was airlifted back to America after contracting the Ebola virus said he was "growing stronger everyday" in a statement written from his hospital isolation room.
Dr Kent Brantly said he was "receiving the best care possible" at the Emory University Hospital in Atlanta and he thanked the people who had helped him. The statement was released on the Samaritan's Purse website.
He added that he had moved to Liberia with his wife Amber and two children with the specific intention of treating Ebola, but said he had recently treated an "increasing number" of patients.
He said: "I held the hands of countless individuals as this terrible disease took their lives away from them. I witnessed the horror firsthand and I can still remember every face and name."
He added that after he had immediately isolated himself after he started to feel ill and had been diagnosed three days later.
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