Abstract
Red bone marrow samples investigation in deceased COVID-19 patients enabled to identify the phenomena of secondary hemophagocytosis. Analysis of the data showed that phagocytic reactions during infection of patients with SARS-CoV-2 are manifested both in relation to erythrocytes and leukocytes. The data obtained make it possible to expand the strategy of therapeutic measures, taking into account the new data on the mechanisms of the pathogenesis of COVID-19 in severe viral infection based on morphological findings and additional information on the involvement of young erythrocytes and lymphocytes in the structure of the red bone marrow in the cascade of pathological reactions. The results obtained confirm a wide range of aggressive damaging effects of SARS-CoV-2 in the development of multiple organ failure against the background of COVID-19 and the involvement of the red bone marrow in the pathological process. The authors supplemented information about the mechanisms of hypoxia in COVID-19, which is not only a consequence of damage to the respiratory epithelium, but also the result of damage to erythrocyte differons both at the level of red bone marrow and in peripheral blood. This fact must be taken into account in the development of a treatment strategy and in the creation of new drugs for the treatment of infected patients with various strains of SARS-CoV-2.
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