From the Reuter's article:
"For patients who have been struggling for more than two years, the chance of a full recovery "is going to be very slim," said Manoj Sivan, a professor of rehabilitation medicine at the University of Leeds and one of the authors of the findings published in The Lancet.
Sivan said this should be termed "persistent long COVID" and understood like the chronic conditions myalgic encephalomyelitis/chronic fatigue syndrome, or fibromyalgia, which can be features of long COVID or risk factors for it.
I wasn't aware that FM or ME made you more at risk for Long Covid. First time I've heard this.
I assume that it would make these conditions much worse so it is why I take precautionary measures.