April 1 tetanus shot, April 23 injured again need tetanus shot?

Tetanus vaccine can be maintained for about 1-3 months under normal circumstances. If you are injured again after vaccination, as long as the wound is not deep and the wound is not very large within half a year, you don't need to vaccinate again. However, if the wound is large and the wound pollutes the soil and rusts seriously, this situation still needs to be vaccinated again.