I also know what really sounds like a COVID long-hauler personally. She's in her 30s, in shape, ran long races as recently as last year, worked as a dev at a healthcare startup and is in the final stages of applying to med school as a returning student.

She's been down for 5-6 months now with recurring symptoms like fatigue and shortness of breath. She's had a very extensive health workup to exclude a number of possibilities (thyroid disorder? CMV?), but is now basically resigned to living with what amounts to moderate asthma and exercise intolerance.