SARS Coronavirus 2 FL.1.5.1

**Semantic type:** Virus

**Definition:** A sublineage variant of the XBB.1.9.1 recombinant lineage of SARS coronavirus 2. This lineage has the same amino acid variations as XBB.1.9.1. The spike glycoprotein of FL.1.5.1 may be missing the T478K amino acid substitution found in XBB.1.9.1 but harbors additional spike glycoprotein amino acid substitutions, F456L, T478R and A701V.

**Synonyms:** - FL.1.5.1 - Fornax - Omicron - SARS Coronavirus 2 Variant Lineage FL.1.5.1 - SARS-CoV-2 FL.1.5.1 - SARS2 FL.1.5.1 - XBB.1.9.1.1.5.1