Picture posting is enabled for all :)
http://www.patient.co.uk/showdoc/40024824/has the 2004 blurb on tetanus. moonbells
a couple of years ago my mum went for her routine 10 year tetanus booster and had a really nasty reaction to it (although she had always had her boosters until then without any problems). The doctor at the time said that the drug just builds up and up in people and can result in a adverse reaction once you are 'full'. He said that he advises patients to have no more than 3 in a lifetime. I am 34 and have always had my regular 10 year boosters so I guess going on this doctors advice I am done with them now.
I think if you wear gloves while gardening, don't put your fork into you foot (doing this once is unfortunate, but more than once - realyy!!!) and preferably don't prune your fingertip, then the risk of tetanus is minimal. :D