Tetanus vaccine can be used for the prevention of tetanus bacillus infections. It can be administered to infants and young children for about 5 to 10 years, and to older children and adults for about one year. 1. Infants and young children: Infants and young children are usually vaccinated three times consecutively in the third, fourth and fifth months after birth, and the antibodies produced by the tetanus vaccine can generally be maintained for 5~10 years. 2. Older Children and Adults: Older children and adults can generally maintain their antibodies for about one year after vaccination, but if they receive a booster injection in the second year to enhance the concentration of antibodies in their bodies, they can also maintain their antibodies for 5~10 years, and after that, they need to be reinforced once every five to ten years. The expiration date of tetanus vaccine is different for different ages. If you are infected by trauma, we recommend that you consult a doctor and choose whether you need to receive tetanus vaccine again according to your symptoms.