The function of the tetanus shot is to activate the body's immune system to produce antibodies that can specifically bind to the tetanus toxin, preventing the toxin from binding with nerve cells and causing a toxic reaction that could lead to respiratory arrest, asphyxiation, and endanger life safety. Tetanus infection occurs when the Clostridium tetani bacteria enter the body through mucous membranes following an injury, producing toxins that affect certain muscle groups, such as the jaw and respiratory muscles, thus threatening life safety. Therefore, the role of the tetanus shot is to produce antibodies that bind to the tetanus toxin, preventing it from producing a toxic reaction with nerve cells. Thus, if some wounds are deep and heavily contaminated, it is essential to undergo anti-tetanus treatment.