“…This was later confirmed by other authors, indicating that in patients who have recovered from Covid-19, the physical and functional impairment can persist for weeks after hospital discharge, as can some symptoms (such as dyspnea, desaturation, coughing, weakness and fatigue). In addition to the damage caused by prolonged hospitalisation and inactivity, the persistent high inflammatory burden and previous health conditions seem to have a negative influence on the recovery of these patients (Santana et al, 2021;Spruit et al, 2020;DeLorenzo et al, 2020;Negrini et al, 2020). The problem is also that in Poland, the post-Covid rehabilitation system is very diverse, and its financing and organisation are handled by the National Health Fund (NFZ), the Social Insurance Institution (ZUS), the Agricultural Health Insurance Fund (KRUS), the State Fund for the Rehabilitation of Disabled Persons (PFRON), and local governments.…”