what are the dangers of not having a tetanus jab?

Well, the only real risk that you are running right now is getting tetanus! I think that you should be okay for the most part, although if you are ever injured or something like that, please let the doctors know that you had a reaction to the tetanus shot because they will often give you a shot when injured. I hope that this helps.

Hello there,

As the bluedog has already answered your question there is no need in repeating it. But I would like to emphasize that you need to be careful not to hurt yourself. And in case that this happens you need to inform doctors about bad reaction that you have. Than they will not give you the regular shoot but another one. I hope this was helpful.