'It's vaccination, stupid,' to borrow - and alter - a famous line from a political strategist in Bill Clinton's US presidential campaign in 1992.
The national vaccination campaign is under scrutiny like no project before in Ireland. It's not surprising, really, as there has never been a project like it before.
Like all major projects, it will have successes, failures and some U-turns. We have seen instances of all three since vaccination began in earnest at the start of the year.
Keeping up with the changing vaccination targets is almost a full-time job. Up to recently, the target was to deliver 250,000 vaccinations a week from this month.