COVID-19 is a disease first reported in 2019 that claimed the lives of more than 6.5 million people worldwide, paralyzed transport links and locked the borders of many states for a long time. In 2023, 3 years have passed since, yet not all countries have fully recovered and lifted the restrictions, which, of course, highlights that COVID-19 has had a huge impact on all aspects of modern life. The pandemic has given a strong impetus to the development of science and the study of COVID-19 and infectious diseases in general around the world, many articles on COVID-19 have been published in the past 3 years. Particularly interesting was the fact that while some people were asymptomatic, had mild COVID-19, other patients required mechanical ventilation and even medically induced coma. In this regard, the study of the genetic factors contributing to the severe course of the disease, comorbidities and the individual response to drugs has become especially relevant. In our work, we consider the main genes and entire loci of chromosomes involved in the pathogenesis of COVID-19. Genes such as IFNAR2, TMPRSS2, ACE2, TYK2, DPP9, HLA, OAS3, ABO, 3p21.31 locus and 12q24.13 locus have been considered; in addition, the association of severe COVID-19 with diseases such as type 2 diabetes, cardiovascular disease and obesity was discussed.
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