Characteristics of the COVID-19 epidemic process in the Northwestern Federal District during the circulation period of the Omicron variant (2022–2024)
Introduction. COVID-19, caused by SARS-CoV-2, remains a significant global health issue. Since late 2021, the Omicron variant has become dominant, characterized by high transmissibility but reduced virulence. Studying the regional characteristics of the epidemic process during its circulation is essential for assessing...