What age‑appropriate booster vaccines should be given to a 5‑year‑old child at the 5‑year immunization visit?

Immunizations at 5 Years of Age

At the 5-year immunization visit, administer DTaP (diphtheria-tetanus-acellular pertussis), IPV (inactivated poliovirus vaccine), MMR (measles-mumps-rubella), and varicella vaccines as booster doses. 1

Core Vaccines Due at Age 4-6 Years

The following vaccines are routinely recommended at this visit:

DTaP (Fifth Dose)

• Administer the final dose in the DTaP series at age 4-6 years 1, 2
• This dose is critical because antibody levels to diphtheria decline significantly by this age, with only 0-40% of children maintaining titers ≥1.0 IU/ml (associated with durable protection) before the booster 3
• The fourth dose may have been given as early as 12 months if at least 6 months elapsed since the third dose, making this fifth dose the final one in the series

IPV (Fourth Dose)

• Administer the final IPV dose at age 4-6 years 4
• The final dose must be given at age ≥4 years regardless of the number of previous doses 4
• The minimum interval from dose 3 to dose 4 is 6 months 4
• Important caveat: If the third dose was administered at age ≥4 years, a fourth dose is not necessary 1, 2

MMR (Second Dose)

• Administer the second dose of MMR at age 4-6 years 1
• This dose may be administered earlier if desired, provided ≥4 weeks have elapsed since the first dose 1
• The minimum interval between doses is 28 days 1

Varicella (Second Dose)

• Administer the second dose of varicella vaccine at age 4-6 years 1
• This dose may be administered earlier if desired, provided at least 3 months have elapsed since the first dose (or ≥28 days if already given) 1
• For children <13 years, the minimum interval is 3 months between doses 1

Additional Considerations

Annual Influenza Vaccine

• Administer influenza vaccine annually 1
• Children <9 years receiving influenza vaccine for the first time need 2 doses separated by ≥4 weeks 1

Catch-Up Vaccination

If the child is behind schedule:

• Hepatitis A: Complete the 2-dose series if not previously vaccinated, with doses at least 6 months apart 1
• Hepatitis B: Administer the 3-dose series if not previously vaccinated 1
• Haemophilus influenzae type b (Hib): Generally not needed for healthy children ≥5 years who missed earlier doses 5

Common Pitfalls to Avoid

1. Do not skip the DTaP booster even if the child received 4 doses—the fifth dose at 4-6 years is essential for durable protection 3
2. Verify the timing of the third IPV dose before deciding whether a fourth dose is needed 1, 2
3. Do not restart vaccine series regardless of time elapsed between doses 1
4. Check for minimum intervals rather than just counting doses, particularly for IPV where the final dose requires a 6-month interval from dose 3 4

The evidence supporting these recommendations comes from ACIP guidelines approved by the American Academy of Pediatrics and the American Academy of Family Physicians 1, representing the standard of care for routine childhood immunization in the United States.