SARS Coronavirus 2 AY.1

**Semantic type:** Virus

**Definition:** A variant lineage of SARS coronavirus 2 where the following variations in the spike glycoprotein sequence have been identified: amino acid substitutions T19R, W258L, K417N, L452R, T478K, D614G, P681R and D950N.

**Synonyms:** - AY.1 - B.1.617.2.1 - Delta - Delta (AY.1) - SARS Coronavirus 2 B.1.617.2.1 - SARS Coronavirus 2 Variant Lineage AY.1 - SARS Coronavirus 2 Variant Lineage B.1.617.2.1 - SARS-CoV-2 AY.1 - SARS-CoV-2 B.1617.2.1 - SARS2 AY.1 - SARS2 B.1.617.2.1