If there's one thing everyone can agree on regarding Australia's vaccine rollout it's that it's a bit of a mess.

As politicians, health authorities and health experts seem to give conflicting advice - it might be worth looking back to see how we go here in the first place.

What exactly changed on Monday with the Prime Minister announcing that under 40s can now access the AstraZeneca vaccine and what do we know about the risk versus the reward?

That's on today's Coronacast.