Not that much, really. People weren't screaming for vaccines until Sydney lost control of the situation. All of the praise for what was effectively a roll of the dice opening up in UK start with "if you ignore the first year of the pandemic they have done brilliantly". Well, the first year is what drove them to it. You'd be getting right in line if 130K people had died and not 800.
The hesitancy was because at one point, there were no COVID deaths in Australia for a long time. So you have press reporting on AZ clotting and no deaths from COVID at all and that tips the scales in people's mind.
I'm not saying it is a logical response but both yourself and
@Pushka talk about the vaccine component only and conveniently leave out the predicament UK and Europe found themselves in with COVID as if they are unrelated, and they're not.
If we want to ask what happened to questions... What happened to Singapore moving to living with it as an endemic, what happened to Israel being the envy of the world. Not at all negative towards the idea of mass innoculation, but we keep being told we're at the cough end of the world for vaccination and missing out and yet it seems those who rush to pronouncements have hit a few snags upon the way that we can afford to learn from.