Vaccine | Minimum age for dose 1 | Minimum interval between doses | |||
Dose 1 to dose 2 | Dose 2 to dose 3 | Dose 3 to dose 4 | Dose 4 to dose 5 | ||
DTaP or DT* | 6 weeks | 4 weeks | 4 weeks | 6 months¶ | 6 months |
DTaP is preferred unless there are contraindications to pertussis component | The minimum age for Dose 4 is 12 months | Dose 5 is not necessary if dose 4 was given at ≥4 years of age and ≥6 months after dose 3 |