SARS Coronavirus 2 XEC

**Semantic type:** Virus

**Definition:** A variant lineage of SARS coronavirus 2 that appears to have originated with a recombination event between two JN.1 sublineages (KS.1.1 and KP.3.3). This recombinant lineage has the same amino acid variations as JN.1 but also harbors the following amino acid variations A599T in the ORF1a protein, G204P in the nucleoprotein (N) and T22N, F59S, F456L, Q493E and V1104L in the spike glycoprotein (S).

**Synonyms:** - JN.1 Recombinant Lineage XEC - KS.1.1/KP.3.3 - Omicron - Recombinant Lineage of KS.1.1 and KP.3.3 - Recombinant Variant KS.1.1/KP.3.3 - SARS Coronavirus 2 Variant Lineage XEC - SARS-CoV-2 XEC - SARS2 XEC - XEC