Yes, it does make sense because this boosts the immunity that is latent in your body from the previous vaccine (DPT) and it kick starts the protection in case it is needed due to infection from the wound. You should repeat the booster every ten years so it is time for you and you should definitely get it now, even beyond the 48 hours.
The answers in online forums are for information only and are not intended to substitute for medical advice and care. Please see your personal health care provider for further evaluation of your individual case.
Debbie Miller, RN