Non-PRO English to Spanish Medical Medical: Health Care

Hello everyone!
I am translating a text about avian flu and there is a term that I don't know how to render it into Spanish even though I know its meaning.

Context:
XXXXXX, a cement trader in Hanoi, says he feels well these days. He works, tends a small forest of potted plants, and spends hours a day jogging and doing breathing exercises. In his living room one day in February he shows off his hospital discharge papers as if they were his new lease on life.

Thanks in advance.