US and UK vaccination profiles are now very similar.
The US is now closer to the UK on first doses and the UK has more-or-less caught up to the US on second doses.
Other than Israel, I think the UK and the US have the most advanced vaccination programmes in the world.
I don't count the countries getting Chinese vaccines because they hardly work.
Canada is doing a great job on first doses, but I wonder why it hasn't transitioned to second ones yet.