This is a study into late untreated borreliosis (a real thing), which is very different from 'chronic lyme'.
So “late untreated borreliosis” is a “real thing” but if someone gets borreliosis, gets treated, yet their symptoms persist (this scenario is what people usually mean by the term chronic Lyme) then that is NOT a “real thing”?
Does this mean that treatment is 100% effective or that if it didn’t work, then it wasn’t borreliosis to begin with?