coastalgran
There are different strains of the variants for Covid just like the flu ones and that is why certainly in Scotland there will be another vaccination come September for certain age groups and vulnerable people. I think we will need to get used to this for a while to come until it dilutes itself enough that we don't get seriously ill. Maybe vaccination has made some people a bit more complacent with hand washing, social distancing etc and illness is the result.
Viruses don't dilute themselves, but they eventually run out of hosts.
I think it is true that vaccinations have given people a false sense of security and they regard themselves as bullet-proof. Vaccinations have thankfully broken the link between infections and hospitalisations and deaths. However, it has never been the case that there was any promise they would stop people being infected. What they have done is make illness less severe for the majority of people.
It would be sensible for people to continue with keeping their distance and wearing a mask. Hopefully, there won't be any need for further lockdowns, but that will depend on the majority of people being sensible.
It's been estimated that approximately 85% of the population needs to have acquired immunity one way or the other, but we're still some way from that figure. It is also not known yet how long immunity lasts.