It’s a very common practice that people take tetanus vaccine after every injury by iron objects especially rusted iron. It is definitely not needed if you have already taken primary vaccination during childhood. As an Adult if you have taken Tdap vaccine then you are protected for ten years. You don’t need tetanus vaccine for your children who are vaccinated with DPT, or Pentavalent vaccine and have received booster at one and half yr and five years.
Tetanus is a serious and deadly disease but due to proper primary vaccination it’s incidence has gradually come down.
Our emphasis should be on 100 % coverage of primary vaccination for every child.