A few months ago, whether the tetanus shot is still needed when the wound is injured again is mainly related to the severity of the wound, if the wound is deeper or the wound is seriously contaminated, it is usually necessary to take another tetanus shot, if the wound is shallow or cleaner, usually disinfection and cleaning can be done, without the need to take a tetanus shot again.
There are generally two types of clinical tetanus shots, including tetanus antitoxin and tetanus human immunoglobulin. Tetanus antitoxin is the most commonly used passive immunization agent and is effective for about 10 days, while tetanus human immunoglobulin is effective for about one month. Having had tetanus a few months ago and now being injured is beyond the expiration date of the tetanus shot.
Tetanus is caused by Clostridium tetani infection. Since Clostridium tetani needs an anaerobic environment for its growth and reproduction, so if the wound is deeper or the wound is seriously contaminated, it will be easily infected with Clostridium tetani, and it is usually necessary to go to the hospital in time to get the injection. However, if the wound is shallow or clean, normal disinfection and cleaning of the wound will be sufficient, and there is usually no need for another injection.
Whether you should get another tetanus shot should be determined by the doctor according to the wound condition. It is recommended that you seek medical attention and clean the wound in a timely manner to keep it dry and hygienic to avoid infection.