Immunization · Tdap
Tdap / Td Vaccine
Tdap protects against three serious bacterial illnesses: tetanus, diphtheria, and whooping cough (pertussis). Td covers tetanus and diphtheria.
After a first adult Tdap, a booster every ten years keeps your protection up to date.
What It Protects Against
- Tetanus — a bacterium found in soil that causes painful, dangerous muscle spasms, often entering through a wound.
- Diphtheria — a serious throat and airway infection, now rare thanks to vaccination.
- Pertussis (whooping cough) — a prolonged cough illness that can be life-threatening for infants.
Who & When
The ACIP recommends:
- One dose of Tdap in adulthood if you didn’t receive it as an adolescent.
- A Td or Tdap booster every 10 years after that.
- Tdap in every pregnancy (ideally 27–36 weeks) to pass protection to the baby.
- An earlier booster with a dirty or serious wound if it’s been more than 5 years.
The bottom line: a booster every 10 years, and a Tdap with each pregnancy.
Is It Safe?
Yes. Side effects are usually mild: a sore arm, and sometimes a low fever or tiredness. It’s recommended and safe in pregnancy, where it’s one of the best ways to protect a newborn from whooping cough before they’re old enough to be vaccinated themselves.
Useful Links
Talk it through with Dr. Mui
Not sure when your last tetanus shot was? We can check and update it. Book a visit.
Prefer to ask first? Text Dr. Mui at 617-675-4085.
This page is for general education and isn’t a substitute for professional medical advice, diagnosis, or treatment. Screening guidelines change over time and the right plan depends on your personal risk. Always talk with a qualified health provider about your specific situation.