The latest S:N501 focal build is now up, with data from 28th Dec:
We can see new sequences from Italy, Israel, Spain, France, & Ireland in the SE England variant (501Y.V1) & Switzerland in the South African variant (501Y.V2).
1/8
https://t.co/PEU7dhptO6
In 501Y.V1 (SE England variant), we can see 1 new sequence from France & Spain, each. The French sample has a travel history to the UK.
3 new sequences are from Israel (marked 1 & 2). Zooming in on '2' (divergence view) shows they are identical, indicating 1 introduction.
2/8
There are 7 new sequences from Ireland, found roughly in 5 places on the tree (4 are singletons, 3 cluster together - 2nd 'group' from the top).
These indicate at least 5 introductions, but we need to zoom in on the 3 that cluster to see more clearly.
3/8
Zooming in to the 3 that cluster together (divergence view), shows it can be difficult to distinguish introductions sometimes, especially as we expect strong travel links between the UK & Ireland, & may only be sampling the total diversity present in Ireland.
4/8
14 new sequences from Italy are scattered across the tree - some alone & some clustering.
Zooming in on a few clusters shows some seem to be linked, while others are harder to determine.
4 seem to be clearly linked as 1 introduction.
5/8