When I was 12 I had to get a booster as I fell on some rusty wire and got a puncture wound in my arm. I can still remember the pain and puss that went with it. A DR saw it and cleaned it imediatly and said it was fine but keep an eye on it a week later it had gone really bad and i couldnt move my arm. Mum took me back and they gave me the tetanus needle a day later and the sweling and redness had gone. I would always do that one even if I didnt do any other vacinations. I still have a scar that is bigger than it should be.