Cmml suddenly disappeared

A close friend was peeing blood 2 years ago. Diagnosed kidney stone. Jan 24 fell, broke their back. During testing was discovered had cmml. Delayed treatment due to being on morphine. Treatment started July 24, chemo, had sepsis, lung infection and was ventilated. Now, mysteriously getting better despite being given 2 days to live 6 weeks ago. Now getting stronger every day and no sign of Leukemia cmml in blood. Can anyone explain this? Heard Pfizer vaccine side effects mimic cmml. A miracle or a mystery?