COVID-19 is currently considered a systemic infection involving multiple systems and
causing chronic complications. Compared to other post-viral fatigue syndromes, these
complications are wider and more intense. The most frequent symptoms are profound
fatigue, dyspnea, sleep difficulties, anxiety or depression, reduced lung capacity,
memory/cognitive impairment, and hyposmia/anosmia. Risk factors for this condition are
severity of illness, more than five symptoms in the first week of the disease, female sex, older …