@Horehound
Does it matter if cases are high when majority of folk are vaccinated?
I think it does, because of the fact that vaccines are not 100% effective.
Say my elderly parents (economically active, in fact my 82 year old father still works full time). They are almost certain to have mounted a less good immune response to the vaccine than younger people.
This does not matter too much if there are only a thousand cases in the country, which we were on track for just a few weeks ago. If they travel, shop, visit, meet, the are very unlikely to come into contact with an infectious person.
However, if there are many tens of thousands of newly-infectious individuals every day, then the likelihood of less-immune vaccinated people coming into contact with them becomes much greater, and thus the number who become ill despite vaccination will be larger.