Post viral fatigue has a limited time frame, you recover from it. Long Covid is a lot more like ME/CFS, looks similar to PVF early on but you don't recover from it and the symptoms often progress and get worse and some people die from it. Its a lifelong severely disabling condition.
Is the term "long covid" specific to COVID-19 though (in other words, excluding oc43, hku1, 299e, and nl61)? Or does it mean "long coronavirus disease", including all covids?
I see it being used both ways.
I don't know if it's drifted, but it was created in late 2020/2021 specifically for COVID-19.
Surely it's strange to use the term "long covid" to describe the effects of only one covid, when at least four others have been circulating for decades or more and have been causing similar effects?