Anyone following Israel recently? Lots of new cases, what's the situation like, aren't they all pretty much vaccinated with two doses so far?
https://www.worldometers.info/coronavirus/country/israel/
If this chap is right, then they have a significant number of unvaxxed over 70s (the group most likely to be hospitalised) and despite their quick start they've not really hit the overall take-up rates we've seen in the UK.
Basically what that means is that they've not reduced their hospitalisation rates as much as they'd hoped, so once case rates rose, hospitalisations rose dramatically. They're trying to fix it by boosting the immunity of the already vaxxed, because there's not much they can do for the unvaxxed except advise them to get the vax or stay at home.
What that basically means is that the UK is "only" experiencing a tenth of the hospitalisations it would have seen pre-vaccine. For Israel is a fifth (so twice as many proportionately as the UK). For the US it's a quarter of the pre-vaccine situation, which is high enough to push their hospitalisations back to pandemic peak levels in some states.
The UK has bad case rate numbers (and isn't vaxxing under 16s) so they don't really expect them to fall. They can live with that as long as the hospitals don't fill up. Which is a "balanced on a knife edge" sort of calculation. If vaccination levels and/or prior infection levels weren't so high in the UK - no way we can cope.
As it is, this is a picture of vaccines working really hard and doing a really good job in the UK:
No one knows for sure what that will look like in the autumn/winter though.