Tetanus Booster Recommendations for Adults
Adults should receive a single dose of Tdap vaccine to replace one Td booster, followed by either Td or Tdap boosters every 10 years thereafter. 1
Initial Tdap Dose
- All adults aged 19 years and older who have not previously received Tdap should receive a single dose of Tdap. 1
- This Tdap dose should replace one decennial Td booster, ideally given if the last Td was administered more than 10 years prior. 1
- However, Tdap can be safely administered at intervals as short as 2 years after the last Td dose when pertussis protection is needed, particularly for healthcare personnel, adults with infant contact, or during pertussis outbreaks. 1
- The interval restriction has been liberalized because the benefits of pertussis protection outweigh the minimal risk of increased local injection site reactions with shorter intervals. 1
Subsequent Decennial Boosters
- After receiving the initial Tdap dose, adults should receive booster doses every 10 years using either Td or Tdap. 1
- This 2019 ACIP update provides flexibility—either Td or Tdap may be used for decennial boosters, whereas previously only Td was recommended for subsequent boosters. 1
- The 10-year interval ensures continued protection against tetanus and diphtheria. 1
Special Populations Requiring Prioritized Tdap
Pregnant Women
- Tdap should be administered during each pregnancy, ideally between 27-36 weeks of gestation, regardless of prior Tdap history. 1, 2
- Vaccination as early as possible within this window maximizes maternal antibody transfer to protect newborns who are most vulnerable to pertussis. 2
Healthcare Personnel
- All healthcare workers with direct patient contact should receive Tdap as soon as feasible if not previously vaccinated, with intervals as short as 2 years after the last Td acceptable. 1
Adults with Infant Contact
- Adults who have or anticipate close contact with infants younger than 12 months should receive Tdap, ideally at least 2 weeks before contact begins, with intervals as short as 2 years after last Td. 1
Wound Management
- For wound prophylaxis in adults who have previously received Tdap, either Td or Tdap may now be used if a tetanus booster is indicated (typically if >5 years since last dose for tetanus-prone wounds, or >10 years for clean minor wounds). 1
- For adults who have never received Tdap, Tdap is preferred over Td for wound management. 1
Safety Considerations
- Research demonstrates that Tdap administered at intervals as short as 18 months after prior Td results in only minimal increases in injection site reactions (≤10% increase in swelling/erythema), with no serious adverse events or Arthus-type reactions. 3
- Multiple studies confirm safety of Tdap given 1-2 years after Td, supporting the shortened interval recommendations. 3, 4, 5
Product Selection for Older Adults
- For adults aged ≥65 years, Boostrix (approved for ≥10 years) is preferred over Adacel (approved for ages 10-64 years), though either vaccine is considered valid and immunogenic in this age group. 1