09.12.21 | Rachel Colquhoun
24.11.21 | New lineages
Newly designated recombinant lineage XB
XB was previously designated B.1.628 but its label has been updated to reflect its recombinant history, as specified under the Pango nomenclature for recombinant lineages. Sequences previously designated B.1.628 are now designated XB and the label B.1.628 has been withdrawn.