I was never a climber (yikes!), but in 2021 I was diagnosed with Chronic Fatigue Syndrome, which has pretty well wrecked my life. As I don't go out often, I have missed COVID so far. Ironic. But there is little help with CFS which adds to depression. On the other hand, research and treatment have improved due to the similarities with Long COVID. It still makes you feel isolated and at a loss. I can totally commiserate with you, Emma.