The tetanus vaccine is an active immunization, after the injection, the body can produce antibodies, which can prevent tetanus for 5-10 years. If within 5 years, there is a break in the body, there is a trauma in the case can not be injected tetanus antitoxin, but the wound should be cleaned and treated to kill the bacteria that may exist inside the wound, also including tetanus bacillus. If there is a traumatic injury after more than 5 years or even more than 10 years, tetanus antitoxin must be injected. Tetanus antitoxin is a passive immunization to fight against the free tetanus toxin that may occur and to prevent the symptoms of tetanus infection that may even cause choking, etc.