There is also the medical term, remission.

Per Wikipedia:

Remission is the state of absence of disease activity in patients known to have a chronic illness that cannot be cured. It is commonly used to refer to absence of active cancer or inflammatory bowel disease when these diseases are expected to manifest again in the future. A partial remission may be defined for cancer as 50% or greater reduction in the measurable parameters of tumor growth as may be found on physical examination, radiologic study, or by biomarker levels from a blood or urine test. A complete remission is defined as complete disappearance of all such manifestations of disease. Each disease or even clinical trial can have its own definition of a partial remission.

My doctor wrote that I am in partial remission, but I have way to go to recovery.