Finnish/Estonian 21J lineage (20%) with S:411S (part of ORF1a:261N branch)

[corneliusroemer]

New lineage proposal
by @corneliusroemer

Description
Sub-lineage of #268 (21J with ORF1a:261N) need to read with this comment #268 (comment)
Earliest sequence: May to July 2021 in Finland
Most recent sequence: Current
Countries circulating: ~20% in Finland and Estonia

Lineage deriving from Delta 21J branch with ORF1a:261N with extra mut S:411S

https://nextstrain.org/groups/neherlab/ncov/finland?branchLabel=aa&c=gt-S_411&gmin=15&label=spike_mutations:I95T&m=div

https://cov-spectrum-develop-git-lapis-and-refactoring-cov-spectrum.vercel.app/explore/World/AllSamples/Past6M/variants?aaMutations=S%3A411S%2CORF1a%3A261N&pangoLineage=B.1.617.2*

Country	Total Variant Sequences	First seq. found at	Last seq. found at
Finland	935	2021-25	2021-37
Germany	3	2021-27	2021-37
Estonia	178	2021-28	2021-37
United States	5	2021-29	2021-37
Sweden	661	2021-29	2021-39
Denmark	7	2021-30	2021-33
United Kingdom	5	2021-30	2021-40
New Zealand	1	2021-30	2021-30
Norway	11	2021-31	2021-34
Switzerland	7	2021-33	2021-38
France	12	2021-34	2021-38
Iceland	1	2021-34	2021-34
Slovenia	1	2021-34	2021-34
Czechia	3	2021-34	2021-35
Turkey	1	2021-36	2021-36
Lithuania	2	2021-37	2021-38

AY.N.x (where N is chosen together with #267 and #268)

[FedeGueli]

The parental lineage has been designated AY.122 in #320 .
Pls @corneliusroemer evaluate if closing this or keeoing it monitored

[chrisruis]

Thanks @corneliusroemer This clade is a sublineage of AY.122 and increased as a proportion of total AY.122 in both Finland and Estonia. It may now be declining but is still responsible for ~30% of AY.122 sequences in these countries in the most recent weeks with data. We've therefore added this as AY.122.2 in v1.2.109 to start on the branch with G22793T (S:A411S)