It does, and anyway if you have a chance to do something that stops you getting sick why not take it I say.

I had the jab and it was painless and I've had no after effects. Yay! *remembers the sore arm for days after my last pneumonia shot*

I wonder if I'm so pro immunisation because I'm old enough to remember kids wearing callipers from polio and losing sight from measles. I also remember going with my parents when they had their routine (and compulsory?) chest X-rays back in the early 60's, though TB is a slightly different case.