SARS Coronavirus 2 AY.3

**Semantic type:** Virus

**Definition:** A variant lineage of SARS coronavirus 2 where the following variations in the spike glycoprotein sequence have been identified: deletion of amino acids 157 and 158 and amino acid substitutions T19R, E156G, L452R, T478K, D614G, P681R and D950N.

**Synonyms:** - AY.3 - B.1.617.2.3 - Delta - Delta (AY.3) - SARS Coronavirus 2 B.1.617.2.3 - SARS Coronavirus 2 Variant Lineage AY.3 - SARS Coronavirus 2 Variant Lineage B.1.617.2.3 - SARS-CoV-2 AY.3 - SARS-CoV-2 B.1617.2.3 - SARS2 AY.3 - SARS2 B.1.617.2.3