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If a six-year-old child is due for the fifth dose of DTaP and inadvertently receives Tdap, I know that this dose counts as the fifth dose of DTaP. But should this child receive another dose of Tdap at age 11–12 years?

Yes. In this situation, a second dose of Tdap should be administered at the recommended age of 11 or 12 years.

Last reviewed: March 31, 2022

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