B3GAT1 and cytomegalovirus infection: Indeed, upon CMV infection, NK cells undergo a major reconfiguration resulting in the expansion of NK cells expressing the HLA‐E‐specific activating receptor CD94/NKG2C and displaying a highly differentiated surface signature, namely, self‐KIR+NKG2A–LILRB1+CD57+Siglec7− [100].