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Cells ; 10(7)2021 07 19.
Article in English | MEDLINE | ID: covidwho-1323130


Since the end of 2019, a new, dangerous virus has caused the deaths of more than 3 million people. Efforts to fight the disease remain multifaceted and include prophylactic strategies (vaccines), the development of antiviral drugs targeting replication, and the mitigation of the damage associated with exacerbated immune responses (e.g., interleukin-6-receptor inhibitors). However, numerous uncertainties remain, making it difficult to lower the mortality rate, especially among critically ill patients. While looking for a new means of understanding the pathomechanisms of the disease, we asked a question-is our immunity key to resolving these uncertainties? In this review, we attempt to answer this question, and summarize, interpret, and discuss the available knowledge concerning the interplay between neutrophils, neutrophil extracellular traps (NETs), and T-cells in COVID-19. These are considered to be the first line of defense against pathogens and, thus, we chose to emphasize their role in SARS-CoV-2 infection. Although immunologic alterations are the subject of constant research, they are poorly understood and often underestimated. This review provides background information for the expansion of research on the novel, immunity-oriented approach to diagnostic and treatment possibilities.

COVID-19/immunology , Extracellular Traps/immunology , Neutrophils/immunology , SARS-CoV-2/immunology , T-Lymphocytes/immunology , Animals , COVID-19/diagnosis , COVID-19/pathology , COVID-19/therapy , Humans , Immunity, Innate , Neutrophils/pathology , T-Lymphocytes/pathology