Is it safe to give anti tetanus and tetanus toxoid to a patient after 3 days of nail injury?

Yes, it is generally safe to administer tetanus toxoid or anti-tetanus immunoglobulin after a nail injury, even if 3 days have passed. The timing for tetanus prophylaxis depends on the patient's vaccination history and the nature of the wound. If the patient’s last tetanus booster was more than 10 years ago (or 5 years for high-risk wounds), a booster is recommended. Always consult a healthcare provider for personalized medical advice.