Never had one, don't think I need one. Never met anyone with tetanus. Stepped on nails, cut with knives, needles, sharp rusty iron, bittin by dogs(in the face, hand, leg) 3x times. Never needed one. They had blacksmiths 100 years ago... didn't ever read how they all died of it. Right now would be a good time to do some reading on the net about vaccinations.