SARS-Related Coronavirus 2 Lineage B.1.1.529; Omicron Variant (Isolate: hCoV-19/USA/MDHP20874/2021) is an enveloped, positive-sense single-stranded RNA virus from the Coronaviridae family and the Betacoronaviridae genus. Severe acute respiratory syndrome-related
coronavirus 2 (SARS-CoV-2), isolate hCoV-19/USA/MDHP20874/2021 was isolated from a nasal swab from a human as part of surveillance testing, on November 27, 2021, in Maryland, USA. Under the nomenclature system introduced by
GISAID (Global Initiative on Sharing All Influenza Data), SARS-CoV-2, isolate hCoV-19/USA/MD-HP20874/2021 is assigned lineage B.1.1.529 and GISAID clade GR using Phylogenetic Assignment of Named Global Outbreak LINeages (PANGOLIN) tool. Each frozen aliquot contains 1 mL of heat inactivated viral culture fluid. The pre-inactivation titer was determined from an infectious aliquot. Viral inactivation is verified after heat inactivation by the absence of viral growth in tissue culture-based infectivity assays.