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Glossary

Tdap vaccine

Also known as: Tetanus-diphtheria-pertussis booster

Medically reviewed, last updated

The Tdap vaccine protects against tetanus, diphtheria, and pertussis (whooping cough). CDC recommends one Tdap booster in adulthood, then Td (tetanus-diphtheria) every 10 years. Pregnant women receive Tdap in the third trimester (weeks 27-36) of every pregnancy to pass pertussis antibodies to the newborn.

Pertussis can be life-threatening for infants too young to be vaccinated themselves. Maternal Tdap is one of the single highest-impact pregnancy vaccinations. Black mothers have lower Tdap-in-pregnancy uptake than white mothers, driven by clinician-conversation patterns rather than patient preference per published research.

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Medical Disclaimer

This glossary entry is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about a medical condition.