In South Korea, a November 2021 outbreak caused by severe acute respiratory syndrome coronavirus 2 Omicron variant originated from 1 person with an imported case and spread to households, kindergartens, workplaces, restaurants, and hospitals, resulting in 11 clusters within 3 weeks. An epidemiologic curve indicated rapid community transmission of the Omicron variant.
Keywords: 2019 novel coronavirus disease; COVID-19; SARS-CoV-2; South Korea; VOC; coronavirus disease; omicron; respiratory infections; severe acute respiratory syndrome coronavirus 2; variant of concern; viruses; zoonoses.