There's another branch of the B.1 polytomy that appears to satisfy the lineage designation criteria, defined by SNP 5595
This mutation is in the inverted terminal repeat - so there's a corresponding SNP at C191615T. This SNP does not appear in the Nextstrain tree because the 3' end is masked to prevent all ITR SNPs from appearing twice.
There's another branch of the B.1 polytomy that appears to satisfy the lineage designation criteria, defined by SNP 5595
This mutation is in the inverted terminal repeat - so there's a corresponding SNP at C191615T. This SNP does not appear in the Nextstrain tree because the 3' end is masked to prevent all ITR SNPs from appearing twice.
https://nextstrain.org/monkeypox/hmpxv1?c=gt-nuc_5595&m=div