UPDATE APRIL 9: Alfred's doctor tried a rescue treatment called 'proning' which involves flipping a patient onto their stomach.
"For individuals with complete respiratory failure, if you open up just a little more lung. This can make the difference between life and death," said Dr. Christopher Voscopoulos, the medical director for the ICU, explained the treatment.
Dr. Voscopoulos also said Alfred is now helping other patients fight off COVID-19.
Alfred donated some of his blood plasma.
Dr. Voscopolous hopes this will work, noting reports out of China where this type of treatment showed promise.
Thursday evening, Alfred shared a message that he was "thankful to be home."
Southern Hills Hospital is celebrating a COVID-19 patient who's recovering and going home.
Alfred, in his 60s, had underlying health issues when testing positive for coronavirus on March 23. The hospital said he was close to dying.
But after three weeks, he was able to leave the hospital without any symptoms.
13 Action News was told Alfred said to the medical staff, "You guys gave me a second chance at life, I could never thank you enough." He also told them, "You are putting your lives on the line for all of us, and I really appreciate that."
Alfred was one of the first patients to be admitted to the ICU at Southern Hills Hospital, and one of the most critical.