pango designations v1.1.23

Release notes

Update to designations of lineage B.1.575 and B.1.575.1.

USA and Aruba lineage with spike mutations "S:P681H","S:S494P" and "S:T716I".

From all SARS-CoV-2 genomes on GISAID as of 2021-04-25, any sequences with at least 8 of the SNPs below were aligned with a selection of B.1 genomes to place them within B.1 diversity. These sequences include previously designated B.1.575 sequences and a couple of sequences that had previously been designated as B.1.1.335.

snps = [
"S:D614G",
"S:P681H",
"S:S494P",
"S:T716I",
"N:T205I",
"orf1ab:T3750I",
"orf1ab:T3255I",
"orf1ab:T265I",
"M:182T",
"orf3a:Q57H"
]

Total designations of B.1.575 and sublineage B.1.575.1:

B.1.575 1,571
B.1.575.1 168

Designation changed to B.1.575:

2 B.1.1.335 sequences

See changes in commit 8a5d954.