• Diphtheria
  • Scheduling Vaccines
  • Pertussis
  • Scheduling Vaccines
  • Tetanus
  • Scheduling Vaccines

We are routinely scheduling the 4th dose of DTaP in children at 15–18 months, but occasionally would like to give it earlier. Is that okay?

The fourth dose of DTaP may be given as early as age 12 months if at least 6 months have passed since the third dose.

Last reviewed: March 31, 2022

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