How long does a tetanus shot last?

Written by Zhang Da Wei
General Surgery
Updated on May 19, 2025
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Tetanus bacillus is relatively common in daily life. Once an infection of this kind occurs, or is suspected, a tetanus vaccine must be administered. The effectiveness of the tetanus vaccine lasts about a week. After this period, it no longer has any special therapeutic effects. This means that administering the vaccine during the onset of the disease can only temporarily help with prevention. If similar infections occur in the future, the vaccine should be administered again. Although the effective period of the tetanus vaccine is very short, as long as it is administered promptly when there is a risk, its safety is still relatively high and it can provide better prevention.

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Written by Zhang Peng
General Surgery
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How long does the tetanus shot last?

The duration of the effectiveness of a tetanus shot depends on whether tetanus antitoxin or tetanus immunoglobulin is administered following a suspected tetanus infection. Both types are forms of artificial passive immunity, providing immediate specific immunity after injection, mainly for treatment or emergency prevention. The metabolism and immune duration of these two injections vary: generally, tetanus antitoxin lasts about seven days, while tetanus immunoglobulin can last up to three weeks. Therefore, the specific duration of the effectiveness of a tetanus shot must be determined based on the individual injection circumstances. For suspected tetanus infections, it is generally advised to administer the injection as soon as possible. It's not that the injection will be ineffective if administered after a certain time, but rather that effective prevention before the onset of the disease can still be beneficial.

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Written by Gao Tian
General Surgery
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Can you get tetanus if there's no rust?

For patients, if a wound occurs without rusting, there is still a possibility of tetanus. This is because if the wound is deep, it can lead to an infection by anaerobic bacteria. Therefore, it is recommended to go to the surgical department for thorough debridement and disinfection as soon as possible. At the same time, pay attention to resting, keeping the wound clean and dry, changing dressings on time, and taking oral antibiotics if necessary, such as cephalosporins, to prevent infection. Generally, with good control, recovery will be quick. However, tetanus can still occur, so it is still necessary to pay attention. Afterwards, keep the wound clean and dry, be mindful of your diet, avoid spicy and irritating foods, and follow up with your doctor.

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Written by Li Jin Quan
General Surgery
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Can you drink alcohol with tetanus?

Tetanus is usually caused by the toxins produced by Clostridium tetani entering the bloodstream, leading to specific clinical manifestations, including muscle tension and rigidity. In severe cases, it can cause respiratory confusion and respiratory failure. If tetanus patients consume alcohol, because alcohol can increase blood circulation and dilate blood vessels, it facilitates the absorption of toxins, accelerating and worsening the symptoms of tetanus. Therefore, patients with tetanus should not drink alcohol and should maintain a light diet.

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Written by Xu Jun Hui
General Surgery
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How long does a tetanus shot last?

After receiving a tetanus shot, it generally lasts for about six months. However, if you are injured again after six months and the wound is heavily contaminated, such as with contaminated soil or rust, and the wound is large and deep, it is advised to undergo tetanus treatment again. The purpose of the tetanus shot is to prevent infection by Clostridium tetani, which is an anaerobic bacterium. It tends to proliferate in anaerobic environments and in conditions of heavy contamination by rust and soil. Therefore, if after tetanus treatment the injury is relatively minor, shallow, and comparatively clean, it is sufficient to clean and dress the wound and keep it dry. If the wound is heavily contaminated, large, and deep, it is recommended to administer the tetanus shot again.

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Written by Li Jin Quan
General Surgery
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Does tetanus cause fever?

When tetanus occurs, early symptoms mainly include dizziness, headache, fatigue, decreased appetite, weak chewing, sore jaw muscles, or tense facial muscles. Some cases show exaggerated reflexes or muscle tension. Generally, tetanus has its typical manifestations, such as difficulty in opening the mouth, risus sardonicus (a sardonic smile), opisthotonus (arching of the back), and stiff neck. In clinical practice, a few cases may even have a fever. Therefore, fever in tetanus is only seen in individual cases.