Agree with DJ6. This is a global forum & thread yet we are side tracked into UK politics.
In addition to Australia & New Zealand, it is almost impossible to get into most East / SE Asian countries unless you have residential status there. Even then, you are looking at mandatory testing and quarantine of all passengers(positive or negative). Current time from arrival to being allowed to quarantine hotel/home in Hong Kong for instance is around 10 hours. This has been the case for many months.
These Asian countries have relatively low infection rates, low hospitalisations & low deaths. Within the communities, many places are leading almost "normal" lives. Border control has been effective and one of the major keys something European countries never got to grips with.
How long that is sustainable is anyone's guess. As for the point of population immunity- the jury is still out on that one too as to how effective that is.
I can't see any alternatives other than a combo of testing, quarantine & vaccine for the foreseeable future.