Determining whether a child needs a tetanus shot after a tetanus shot needs to be determined on a case-by-case basis. First of all, there is no need for tetanus, if the last time a child gets a tetanus shot is not more than three years from the time of injury. This is because after a child has had the tetanus vaccine, the body will have the appropriate antibodies to tetanus, protective antibodies will remain at a high level for about three years, there is no need to play tetanus again at this time. The second is the case of tetanus needed, if the child’s wound is deeper, the wound is smaller, there is a risk of tetanus infection, and the last shot of tetanus vaccination has been more than three years, we should timely tetanus.