As a measure of how the mood music can change rapidly in this public health crisis, last Monday's NPHET media briefing was one of the most upbeat for a long time.
We heard about sustained progress in suppressing transmission of Covid-19 and maybe even signs of accelerated progress. But by Thursday, the upbeat tempo was gone and NPHET issued warnings about Ireland sailing close to the wind and how a gust in the wrong direction could put us in danger.
It all reflects the turbulent times we are currently in with Covid-19 and why the outlook is uncertain. Human beings like certainty, so we can plan.
But with case numbers still hovering quite high, major vaccine supply problems and around 17 different changes to the vaccination programme, it’s