SARS Coronavirus 2 BA.1

**Semantic type:** Virus

**Definition:** A variant lineage of SARS coronavirus 2 where the following variations in the spike glycoprotein sequence have been identified: deletions of the amino acids at positions 69/70, 143/145 and 212 and amino acid substitutions A67V, T95I, G142D, N211I, G339D, S371L, S373P, S375F, S477N, T478K, E484A, Q493R, G496S, Q498R, N501Y, Y505H, T547K, D614G, H655Y, N679K, P681H, N764K, D796Y, N856K, Q954H, N969K and L981F.

**Synonyms:** - B.1.1.529.1 - BA.1 - Omicron - Omicron (BA.1) - SARS Coronavirus 2 Variant Lineage BA.1 - SARS-CoV-2 BA.1 - SARS2 BA.1