Why is inactivated vaccine used in tetanus vaccination?

Tetanus illness is driven by a toxin made by certain bacteria, rather than by the bacteria spreading through the body in the usual way. A toxoid is a changed form of that toxin. It cannot produce the harmful effect, but it helps the immune system learn what to recognise and counteract.

This is why tetanus vaccination is often described with the language of inactivation: the vaccine component is not a live tetanus germ. Booster doses may be advised to maintain protection, and the timing can depend on your vaccination history and a particular wound.

Clean a cut or puncture promptly with clean running water and remove visible dirt if it comes away easily. Keep the wound protected and check your vaccination record. A clinician can decide whether the wound type and your record indicate a tetanus vaccine dose or other care.

Do not use a wound's size as the only guide. Punctures, contaminated wounds, bites and injuries involving dead tissue deserve particular attention because they can be difficult to clean fully.

Arrange prompt medical advice for a deep, dirty, puncture or bite wound, or if you do not know when you last received tetanus vaccination. Seek urgent care for uncontrolled bleeding, loss of feeling or movement, a wound with a foreign object, or signs of infection such as worsening redness, warmth, swelling, pus or fever.

Ask what type of wound you have, whether your immunisation record is up to date, and whether you need a vaccine dose now. Ask how to care for the wound at home and which changes should prompt a return visit.