Tetanus-Diphtheria Vaccination for Adults

Primary Recommendation

The Advisory Committee on Immunization Practices (ACIP) recommends that all adults aged ≥19 years should receive Td or Tdap for tetanus prophylaxis, not TT alone, with a strength of evidence considered high 1, 2
Adults who have never received Tdap should get one dose of Tdap regardless of when they last received a tetanus-containing vaccine, followed by Td boosters every 10 years, as recommended by the Centers for Disease Control and Prevention (CDC) 2, 3

Td provides dual protection against both tetanus and diphtheria with a single injection, whereas TT only protects against tetanus, according to the World Health Organization (WHO) 2, 4
Serosurveys indicate that 49%-66% of adults ≥60 years lack protective levels of circulating antitoxin against diphtheria, making the diphtheria component essential, as reported by the American Academy of Family Physicians (AAFP) 2

Tdap should replace one Td booster dose in all adults aged ≥19 years who have not previously received Tdap, providing additional protection against pertussis, as recommended by the CDC 1, 3
Immunity to pertussis wanes approximately 5-10 years after childhood vaccination, leaving adults susceptible and capable of transmitting pertussis to vulnerable infants, according to the American Academy of Pediatrics (AAP) 3

Healthcare workers with direct patient contact should receive Tdap as soon as feasible, with intervals as short as 2 years from last Td acceptable, as recommended by the Occupational Safety and Health Administration (OSHA) 1, 3
Adults with close contact to infants <12 months (parents, grandparents, childcare providers) should receive Tdap at intervals <10 years since last Td, ideally at least 2 weeks before contact begins, according to the AAP 1, 3
Pregnant women should receive one dose of Tdap during EACH pregnancy at 27-36 weeks gestation, regardless of prior Tdap history, as recommended by the American College of Obstetricians and Gynecologists (ACOG) 2, 4

Do not give tetanus boosters more frequently than every 10 years for routine immunization to avoid Arthus reactions, as warned by the FDA 2
For wound management in contaminated injuries, the 5-year rule applies (not the 10-year rule for routine boosters), according to the CDC 2, 4