That chart is fascinating - especially the extent of which some countries apparently have virus strains from every branch, while others have 1 or 2 distinct lin

That chart is fascinating - especially the extent of which some countries apparently have virus strains from every branch, while others have 1 or 2 distinct lineages (Washington State being the biggest one). That does imply that the UK and Netherlands have seen the virus introduced from many sources, which suggests much more widespread transmission than eg New Zealand, which appears to have one lineage. However, there's probably a huge sampling bias present. Hopefully we can keep doing this sort of genetic lineage testing at greater rates - it's incredibly informative on how it spreads.