@Balloonrace
My concern is that without the additional immunity that arises as a result of natural infection, the exit wave in zero covid countries will be so significant that further lockdowns will be required to keep levels manageable.
If only they'd already had a wave of infections significant enough to need lockdowns, like we did, then they'd have a good level of natural immunity like the UK has and they could... avoid an exit wave of infections significant enough to need lockdowns. I bet they must be kicking themselves!
I think you're right that things may seem worse post vaccine than pre vaccine there, but I think characterising the problem as 'lack of natural immunity' doesn't really make sense, as the only way to have got that natural immunity would have been to have gone through an even worse wave with high numbers of deaths earlier on.
My point is, is that the message? Is that generally being communicated/understood?
Immunity (however it's acquired) will eventually reduce cases. It stands to reason that countries that have had widespread infection AND high levels of vaccination will have more overall immunity than those whose population only have vaccine induced immunity. When restrictions are lifted I'd expect a bigger exit wave in the latter.
That's not a criticism of any particular approach, just an observation. With delta on the scene it seems less likely to me that zero covid countries will simply be able to open even after widespread vaccination. It's going to be a much more protracted process than I think is generally appreciated.
I can completely see why NZ and Australia pursued zero covid, I think it was a completely unrealistic and unachievable aim for the U.K. (and so I'm glad we didn't attempt it as I think it would have been an abject failure) but that's principally because of things like supply chain issues etc.
No one really knows how any strategy will ultimately work out when we all look back on this in 10 years time, I suspect every country will have its fair share of things that could have been done differently with the benefit of hindsight.