Ongoing COVID-19 syndrome and post-COVID-19 syndrome: Long-term symptoms and residual changes after SARS-CoV-2 infection

Recently, in the time SARS-CoV-2 pandemic, there is increasing interest among the medical community in post-COVID-19 residual symptoms including structural and functional changes in different organs and systems. The symptom characteristic and parameters of these changes in the period after illness are in the process of registration and complete clarification, and the first results were published. It becomes clear that symptoms of COVID-19 (over 30 in number) even among those with a “mild form” of the disease remain for a long time after the acute phase in a large number of patients. More data are needed on the somatic, mental and emotional characteristics of patients who have undergone COVID-19, the so-called „prolonged COVID-19 syndrome“, despite the lack of a generally accepted definition.. Knowledge of its clinical characteristic will help physicians to recognize its manifestations, and the healthcare system to prepare for its prevention and treatment.