I don't know, but an Eastern view seems to be that we can potentially be instantly be healed of anything.

But that most of us (a) can't reliably access the levels of mind required to enable this, and (b) anyway out of delusion do lots in life that harms us and so bring on death.

There's stories of realised teachers manifesting illnesses and making them disappear again, or taking on illnesses from others. Sri Ramana Maharishi I think is quoted quite a lot on the subject of healing, maybe worth a Google...