In places with good contact tracing, they should mostly be able to keep it at near zero after that point by tracing and self-quarantine, occasionally needing to use the vaccine on a whole city if you find that you had a super-spreader event.
In places without good contract tracing, it would be similar except the threshold at which you need to vaccinate the city would be lower.
We’ve had a measles vaccine for three generations, we still have the measles.
We’ve had a polio vaccine for three generations, polio is not eliminated.
Seriously, though, i wonder why would Russia be developing coronavirus vaccine if most people these days die there from "atypical pneumonia" and not from coronavirus ... at least if one is to believe the official info.
This point never came for influenza anywhere, why would you think it will come for COVID19, a much more contagious and invisible in many more cases virus?
They are anti-vaxxers, yes, so no wonder that they could technically get measles, but where did it come from? It was completely irradicated because most people had the immunity. The virus should have died off and disappeared from the face of the planet. And yet here were are. There must mechanisms for viruses to survive this.