Before relocating his family from Texas to Liberia in 2013 to work in a clinic trying to help contain the Ebola virus epidemic, Kent Brantly gave a sermon in his hometown explaining his decision.
Dr. Brantly who inevitably caught the incurable and highly-deadly disease, gave religious reasons for his missionary trip.
The Centers for Disease Control and Prevention said the father-of-two 'seems to be improving', 24 hours after landing in Georgia from Liberia on Saturday for treatment.
Brantly was transferred, surrounded by high security to Emory University Hospital in Atlanta, which is fitted out with one of the most sophisticated containment facilities in America.
He was pictured being helped out of a special ambulance in a hazmat suit and walking into the hospital.
Before Brantly went to Liberia last October, he returned to his hometown of Indianapolis and gave a sermon at the Southeastern Church of Christ.
'For two years we will live and work and serve among the people who, until the last 10 years of peace, had known nothing but the violence and devastation of war for the previous 20 years,' Brantly told the congregation.
'I've never been to Liberia.
'(I'm going) because God has a call on my life.'
'On difficult days, when I want to give up or when I wonder if I've made the right decision, retelling my story reminds me of how God has brought me to where I am.'
Brantly was able to meet with his wife, Amber, in protective conditions for 45 minutes after arriving in the country on Saturday.
According to Daily Mail, She said he was in 'great spirits and extremely grateful' to be home according to a statement released on her behalf by the Christian charity Samaritan's Purse.
The doctor's sister, mother and father are also at the hospital and it was a 'relief to welcome him home', they said via the charity.
U.S. officials are confident that Brantly and a second patient - aid worker Nancy Writebol, who is expected to arrive in Atlanta on Tuesday- can be treated without putting the public in any danger.