Use lineages for build targets

[trvrb]

We have a number of pathogens where the primary split is in terms of geography. For example: ncov/gisaid/global/ vs ncov/gisaid/north-america/. However, for WNV it looks like there are really very distinct lineages (that often have geographic correspondence). Here's a quick phylogeny from https://www.mdpi.com/1999-4915/15/1/35:

I think you have a dengue like situation where a single phylogenetic analysis across all WNV lineages (or dengue serotypes) may be challenging to have very accurate molecular clock.

Rather than cuts between a global analysis and a north-america analysis, you might be better served by cutting by lineage instead. This would give URLs of wnv/all-lineages, wnv/lineage-1, wnv/lineage-2, etc... I wouldn't worry about trying to preserve that historical WNV/NA endpoint.

NCBI doesn't seem to have lineage well annotated, however if you source data from https://pathoplexus.org/west-nile/ you should get lineage for every sequence.