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Can still get it after vax or having had it before as you know. But it's less likely and also less transmissable once you have it. In January, this many daily cases would have been doubling every week or so. The extra exposure from schools back etc is roughly balanced by the immunity levels currently. It may remain balanced as we get into more wintery season (windows closed, people indoors etc) but I'd expect this level of cases will start to slowly drop now.
And also less bad, so the case numbers don't translate into hospitalisation (and serious illness/death) in the same way it did.
High cases, but not growing exponentially anymore. (Probably) there are enough vaxxed / with natural immunity from having had it to be at the herd immunity threshold. There aren't enough people to infect anymore.
End of summer, kids back to school, unis back - none of these have caused a significant spike. Maybe add the cold theory and it seems we are pretty much at the 'living with it' level.