The number of tetanus shots required depends on the specific condition of the wound and the patient's previous immunization history. Generally, for smaller, superficial, and cleaner wounds, which are considered to have a low risk of tetanus infection, the body can produce protective antibodies on its own. In such cases, a tetanus toxoid injection is given once a month, usually three times in total, allowing the patient's body to produce active antibodies and obtain long-term protection. If the wound is large, deep, and contaminated, with a substantial amount of foreign material or necrotic tissue, the chances of tetanus infection are very high. In such cases, passive immunization is actively conducted, usually involving tetanus antitoxin or immunoglobulin. Here, typically three doses of tetanus toxoid are administered to stimulate the body to produce active antibodies and achieve long-term protection.