Home / Ask The Experts / A 16-year-old has a written record of receiving two doses of DTaP at 2 and 5 months of age and one dose of Tdap at 15 years of age. Since she has had three doses of pertussis-containing vaccine, would she still need two additional doses of Td?

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A 16-year-old has a written record of receiving two doses of DTaP at 2 and 5 months of age and one dose of Tdap at 15 years of age. Since she has had three doses of pertussis-containing vaccine, would she still need two additional doses of Td?

Since the first DTaP was received before 12 months of age and one Tdap dose has been given, this person needs one dose of Td or Tdap 6 calendar months after the Tdap dose. A routine Td or Tdap booster should be administered every 10 years. See Immunize.org’s handout: DTaP, Tdap, and Td Catch-up Vaccination Recommendations by Prior Vaccine History and Age: www.immunize.org/catg.d/p2055.pdf.

Last reviewed: March 31, 2022

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This page was updated on April 24, 2022.