It would be ok if the vaccine gave 100% immunity and didn’t wear off over time. Some of the vulnerable will be coming up to 9 months post-vaccination in less than 2 months.
The plan is boosters from September and, of course, if younger people have been vaccinated by then, spread will be substantially lower.
That being said...
I'm sure we had these conversations last summer, and in the run-up to Christmas.
Of course we hope vaccines do their thing, but it'd be a fool not to take note of such large %age increases, and not be keeping an eye on what happens going forward, especially in the next couple of weeks as before you know it, we're allowing people to hug and kiss others on tube trains, so inevitably it'll go up at that stage. I'm still wondering if masks on public transport / shops end up compulsory after all, when it comes to the detail on Monday - if nothing else than to make the spread manageable for health services. In that respect, keeping an eye on trends is important...