Jimmy Carter, the 39th president of the United States, exhibited peace and calm when he announced earlier this year that he was battling cancer. Now, his faith and confidence in God is paying off since doctors have found a marked improvement on his treatment.

According to a statement released by Carter's spokeswoman on Tuesday, the 91-year-old former president will still continue having tests, but for now, they are pleased with the outcome Carter has been exhibiting.

Spokeswoman Deanna Congileo said in a statement shared with Fox News "that recent tests have shown there is no evidence of new malignancy, and his original problem is responding well to treatment."

Carter revealed on Aug. 12 this year that he had been diagnosed with liver cancer, and doctors have unfortunately found four tumours on his brain. A statement obtained from the Carter Centre website read: "Recent liver surgery revealed that I have cancer that now is in other parts of my body. I will be rearranging my schedule as necessary so I can undergo treatment by physicians at Emory Healthcare."

Since then, he has received radiation treatment specifically targeting those tumours. He also had four doses of Keytruda, which is a new and improved immune-boosting drug designed to help his body's defences to seek out and destroy any new cancer cells.

Despite his cancer diagnosis, Carter remained committed in teaching Sunday school weekly at his hometown church Maranatha Baptist Church in Georgia. He had also volunteered building homes for Habitat for Humanity, and even served as a mediator when Martin Luther King Jr.'s children had a dispute.