The Tetanus infection has an incubation period of 10 -20 days.
So the symptoms should appear maximum in a month.
But in case of any injury i would suggest not to wait for the symptoms and take the tetanus vaccine as soon as possible after injury.
Next Steps
Take Tetanus Toxoid Vaccine as soon as possible after injury.
Health Tips
in case of injury, clean and dress the wound with antiseptic cream.