Tanaka, Atsushi; Miyazawa, Takayuki August 15, 2023 READ
Over the past three years, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has repeatedly caused pandemics, generating various mutated variants ranging from Alpha to Omicron. In this study, we aimed to clarify the evolutionary processes leading to the formation of SARS-CoV-2 Omicron variants, focusing on Omicron variants with many amino acid mutations in the spike protein among SARS-CoV-2 isolates