Table 1.

Mutational differences among Delta and Omicron variants of concern.

	Mutations
Variant of Concern	RBD (Receptor-Binding Domain)	NTD (N-Terminal Domain)
Delta (B.1.617.2)	L452R T478K	T19R T95I G142D ∆E156 ∆F157 R158G
Omicron (B.1.1.529)	G339D S371L S373P S375F K417N N440K G446S S477N T478K E484A Q493R G469S Q498R N501Y Y505H T547K	A67V ∆H69 ∆V70 T95I G142D ∆V143 ∆Y144 ∆Y145 ∆N211 L212I +214EPE