Most people who get tetanus haven't been immunized or haven't had their tetanus booster. If you haven't been immunised or you haven't had your booster, you can get tetanus if you have a wound and it becomes infected - this may be minor such as a scratch or cut or you may have had a piercing, or inject illegal drugs or medicines using a needle that isn't sterile and has tetanus bacteria on it. Visit a health unit to get immunized/booster.
Attribution: BUPA