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After age 12, a tetanus booster shot usually is recommended every 10 years. Under special circumstances, however, a doctor may give the booster dose sooner. For example, a tetanus booster is usually given if you get a severe cut or puncture wound and it has been more than 5 years since your last tetanus shot.
Although tetanus-causing bacteria needs three days to incubate and release the toxin to your blood, you do not have to wait for that long. Soon after you get wounded, try to recall the last time you get a shot of tetanus. Tetanus vaccine should be given when you are young and be repeated once every 10 years. When you step on a rusty nail and havenât got the shot in the last five years, you need to go to the hospital within 24 hours to get the shot. If you have got the shot within the last five years and the wound is not deep and severe, you can take your time to see whether you have the tetanus symptoms.