When a wound is severely contaminated, or deep, and there is a risk factor for tetanus infection, it is generally necessary to go to a regular hospital to receive a tetanus vaccine. The injection sites for the tetanus vaccine are mainly two places: first, the deltoid muscle of the upper arm; second, the gluteus maximus of the buttocks. Most hospitals currently advocate administering the tetanus vaccine in the gluteus maximus. After receiving the tetanus vaccine, one must be observed for half an hour before leaving.