Happiness does not wait for the all-clear. That is the useful thing to know about it, and it is easy to miss while you are busy postponing.
People describe the best afternoon of a bad year happening in a hospital garden, or in a car park, eating chips out of paper with somebody who came down for the day.
The health part keeps its own schedule and does not take instruction. The happiness part turns out to be less dependent on it than anyone expects — smaller in scale, available in shorter units, and not waiting on the paperwork.