Doctors give tetanus vaccine after getting a cut or wound while handling a sharp instrument

Question

Give scientific reason:

Doctors give tetanus vaccine after getting a cut or wound while handling a sharp instrument or after falling down and getting bruised badly while playing.

Answer 1

Tetanus germs are present in the soil, dung and dust. The sharp instrument may be dirty, so it may carry the tetanus germs. These germs may then spread though the wound and cause disease. To prevent tetanus germs from spreading doctors give the vaccine which help us develop resistance against this disease.