I say this because SIL lives 5 minutes down the road and her area are completely exempt from it 
I asked one of my local health professionals why we were in the catchment area for it and he said it was to do with a lot of immigration control, hence the vaccine being offered.
But, we don't go to that side of our town (it's a big town), and we don't mix in that area (it's not a short way away).
And even if we did and that slight chance would be the reason for it, why doesn't SIL's area get offered it when she's literally in spitting distance.
Taking all this into account, I'm not really comfortable with my DC having it. It's not a nice vaccine to have and often leaves a scar