Polskie Archiwum Medycyny Wewnętrznej
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Pol. Arch. Med. Wewn. · May 2023
Differences between the course of SARS-CoV-2 infections in the periods of the Delta and Omicron variants dominance in Poland.
Up to now, COVID‑19 caused more than 6 million deaths worldwide. So far, 5 variants of concerns have been identified, with Delta and Omicron being the subject of our analysis. ⋯ The Delta variant is associated with a more severe clinical course of the disease and a higher risk of death than the Omicron variant.