We report the rapid emergence of severe acute respiratory syndrome coronavirus 2 lineages B.1.619 and B.1.620 in South Korea. The surge in frequency in a relatively short time emphasizes the need for ongoing monitoring for new lineages to track potential increases in transmissibility and disease severity and reductions in vaccine efficacy.
Keywords: 2021. Emerg Infect Dis. 2022 Feb [date cited]. https://doi.org/10.3201/eid2802.211653; B.1.619; B.1.620; COVID-19; Kim HM; Kim I-H; Kim J-A; Lee H; Lee N-J; SARS-CoV-2; South Korea; Suggested citation for this article: Park AK; coronavirus disease; et al. SARS-CoV-2 B.1.619 and B.1.620 lineages; respiratory infections; severe acute respiratory syndrome coronavirus 2; viruses; zoonoses.