Patients are susceptible to tetanus infection in the following situations: First, tetanus infection belongs to anaerobic bacterial infection, only when the wound is deeper is it possible to be infected with tetanus, if it is only a superficial surface abrasion, there is no reproduction conditions for Clostridium tetani, and this situation will not be infected with tetanus, so patients with deeper wounds will have a greater likelihood of infection; Second, Clostridium tetani is usually present in rusty nails, Rusty knives on the soil and other substances, there will also be tetanus clostridium, so patients who are injured by rusty iron or the wound is dirty, there has been contact with the soil, there is a possibility of infection with tetanus clostridium. Tetanus is a very dangerous disease with a high mortality rate and difficult to treat, so patients who are at risk of tetanus should receive a tetanus shot to prevent the disease.