And a recent one. There was no problem with my father being advised to take months to rest when he had a recurring post viral condition from the 1930's to 1960's. Every time it recurred he rested, sometimes for several months, until he completely recovered, then got on with his active life. The same happened with me after what was probably glandular fever in the 1970's. 6 months in bed, then back to an active life. Neither of us needed rehabilitation therapy or GET or whatever. We simply rested until we were fully recovered.This suggests that the fear suffered by many doctors of advising bed rest and of scaring patients with a harsh prognosis is a Western cultural phenomenon.
That had changed completely by the time I got sick in 1989. Then it was take a week or 2 off if you must, but don't rest too much, then go back to work and when it recurs the same - stay active, get back to work, put up with feeling dreadful.