As a typical example, Yang et al
The WHO estimates it affects between 1020% of people infected with SARS-CoV-2 tens of millions globally.1 The symptoms are wide-ranging but cluster into recognizable patterns: Neurological: brain fog, cognitive impairment, headaches, sleep disruption Cardiovascular: chest pain, breathlessness, tachycardia (POTS), reduced exercise tolerance Immune: persistent low-grade inflammation, recurrent infections, autoimmune flares Musculoskeletal: post-exertional malaise (PEM), joint pain, muscle weakness Metabolic/endocrine: insulin dysregulation, thyroid disruption, adrenal fatigue signals Standard care rest, symptom management, antidepressants, rehabilitation programs helps some patients
The accuracy of the predicting values also needs to be validated in a future study involving a larger population
They can, however, be used to guide decision-making about the specific patient populations addressed in the trials