5/ 10Borderline
A prospective observational study of post-COVID-19 chronic fatigue syndrome following the first pandemic wave in Germany and biomarkers associated with symptom severity
Kedor C, Freitag H, Meyer-Arndt L, et al. · Nature Communications · 2022
Careful early evidence that some people meet strict ME/CFS criteria after mild COVID-19, but the headline blood-marker links to grip strength appear to pool men and women, and most weaken or vanish in women alone.
Self-referred patients; cannot show how commonNo healthy or recovered controls measuredStrict criteria, with a real medical work-up