Tetanus vaccine, also known as tetanus toxoid (TT), is an inactive vaccine used to prevent tetanus.During childhood, five doses are recommended, with a sixth given during adolescence.Additional doses every ten years are recommended. After three doses, almost everyone is initially immune. In those who are not up to date on their tetanus immunization, a booster should be given within 48 hours of an injury. In those with high-risk injuries who are not fully immunized, tetanus antitoxin may also be recommended. Making sure pregnant women are up to date on their tetanus immunization can prevent neonatal tetanus.