Dog bites usually do not require a tetanus shot if the wound is shallow. If the wound is deeper, a tetanus shot may be needed. 1. No need to play: tetanus is an acute, infectious toxic disease caused by Clostridium tetani, which can be prevented by tetanus shots. If the dog bite wound is shallow, you generally do not need to take a tetanus shot, because Clostridium tetani needs to grow in an anaerobic environment, and shallow wounds generally do not form an anaerobic environment. 2. Need to play: After being bitten by a dog, if the wound is deeper, you need to take a tetanus shot, because deeper wounds may form an anaerobic environment, which may cause Clostridium tetani to grow and multiply, thus producing toxins, so you need to take a tetanus shot for prevention. After being bitten by a dog, rabies vaccination is also needed as soon as possible so as to prevent rabies. Patients who have been bitten by a dog are advised to go to an epidemic prevention center or hospital in time so as not to affect their health.