SARS Coronavirus 2 XBB

**Semantic type:** Virus

**Definition:** A variant lineage of SARS coronavirus 2 that appears to have originated with a recombination event between the BJ.1 lineage (BA.2.10.1.1; B.1.1.529.2.10.1.1) and a sublineage of BA.2.75, specifically the BM.1.1.1 lineage (BA.2.75.3.1.1.1; B.1.1.529.2.75.3.1.1.1), with a breakpoint within S1.

**Synonyms:** - BJ.1/BM.1.1.1 - Omicron - Recombinant Lineage of BJ.1 and BM.1.1.1 - Recombinant Variant BJ.1/BM.1.1.1 - SARS Coronavirus 2 Variant Lineage XBB - SARS-CoV-2 XBB - SARS2 XBB - XBB