I have a scar like that on my arm from the TB vaccine (BCG), given when I was about 13 (I'm in the UK). That was in the late 90's though, so I don't know whether they still give them out. They gave you a 'heaf test' on your wrist (lots of little needles) to see if you showed seroconversion (i.e. evidence of either prior vaccination or exposure to TB), and if you didn't have any reaction, you got vaccinated.
I have a feeling they don't give them any more - the BCG isn't a particularly good vaccine, and TB is hard to diagnose (and treat).
Smallpox vaccines were stopped some time in the late 70s early 80s I believe. It was declared eradicated in 1979.