The COVID-19 pandemic has generated numerous questions about the pathophysiology of the acute phase of this disease, and as time goes by, also of the chronic phase, known as post-COVID-19 syndrome. Although the neurological phenotype (post-COVID 19 neurological syndrome) is the most debated, the evidence points to the fact that the main manifestations of post-COVID 19 patients, regardless of disease severity, are dyspnea, fatigue, tachycardia, and difficulties in performing activities of daily l...