For the timing of tetanus antitoxin injection, the best time to inject tetanus vaccine is generally within 24 hours after the injury, so once there is an injury, tetanus antitoxin should be injected as early as possible, generally not more than 24 hours, if there are objective reasons for not being able to inject tetanus antitoxin within 24 hours If there are objective reasons for not being able to inject tetanus antitoxin within 24 hours, you can also inject tetanus antitoxin 24 hours after the injury, but the effect of delayed injection will be reduced, and the protective effect will be reduced. In addition, for patients with allergies to tetanus injection, desensitization injections can be completed, or tetanus immunoglobulin can be switched to prevent the occurrence of tetanus. For newborns, tetanus antitoxin should be injected immediately after the treatment of the umbilical cord to prevent the occurrence of neonatal tetanus. In summary, tetanus vaccine should be given as early as possible. Once there is a trauma or wound, especially a contaminated wound, tetanus antitoxin should be injected as early as possible within 24 hours, and the specific situation should be treated under the guidance of a clinician, so that the doctor can give a guiding plan and follow the medical advice, and patients are advised not to delay in order not to aggravate the risk.