- Diphtheria
- Scheduling Vaccines
- Pertussis
- Scheduling Vaccines
- Tetanus
- Scheduling Vaccines
If a child didn’t have the recommended 6-month interval between DTaP doses #3 and #4, should it be repeated?
If DTaP #4 is given with at least a 4-month interval after DTaP #3, it does not need to be repeated. The minimum age of 12 months for the fourth dose must be met. Decreasing the interval to less than 6 months, however, is not recommended.
Last reviewed:
March 31, 2022