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Catch-up Immunization Schedule for Children and Adolescents Who Start Late or Who Are More than 1 Month Behind, 2023Recommendations for Ages 18 Years or Younger, United States, 2023						Print
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										The tables below provide catch-up schedules and minimal intervals between doses for children based on age whose vaccinations have been delayed.Children Age 4 Months through 6 YearsVaccine
Minimum Age for Dose 1
Minimum Interval Between DosesDose 1 to Dose 2
Dose 2 to Dose 3
Dose 3 to Dose 4
Dose 4 to Dose 5Hepatitis B
Birth
**4 weeks**
**8 weeks and at least 16 weeks after first dose.** Minimum age for the final dose is 24 weeks.Rotavirus
**6 weeks** Maximum age for first dose is 14 weeks, 6 days.
**4 weeks**
**4 weeks**
Maximum age for final dose is 8 months, 0 days.Diphtheria, tetanus, and acellular pertussis
6 weeks
**4 weeks**
**4 weeks**
**6 months**
**6 months***Haemophilus influenzae* type b
6 weeks
**No further doses needed**
if first dose was administered at age 15 months or older.**4 weeks**if first dose was administered before the 1st birthday.**8 weeks (as final dose)**
if first dose was administered at age 12 through 14 months.
**No further doses needed**
if previous dose was administered at age 15 months or older.**4 weeks**
If current age is younger than 12 months **and** first dose was administered at younger than age 7 months and at
least 1 previous dose was PRP-T (ActHib®, Pentacel®, Hiberix®), Vaxelis® or unknown**8 weeks and age 12 through 59 months (as final dose)**
if current age is younger than 12 months ***and*** first dose was administered at age 7 through 11 months;
OR
if current age is 12 through 59 months ***and*** first dose was administered before the 1st birthday, ***and*** second dose was administered at younger than 15 months;
OR
if both doses were PedvaxHIB® and were administered before the 1st birthday
**8 weeks (as final dose)**
This dose only necessary for children age 12 through 59 months who received 3 doses before the 1st birthday.Pneumococcal conjugate
6 weeks
**No further doses needed**
for healthy children if first dose was administered at
age 24 months or older. **4 weeks**
if first dose administered before the
1st birthday.**8 weeks (as final dose for healthy
children)**
if first dose was administered at the
1st birthday or after.
**No further doses needed**
for healthy children if previous dose was administered at age 24 months or older. **4 weeks**
if current age is younger than 12 months and previous dose given at <7 months old.**8 weeks (as final dose for healthy children)**
if previous dose given between 7-11 months (wait until at least 12 months old);
OR
if current age is 12 months or older and at least 1 dose was administered before age 12 months.
**8 weeks (as final dose)**
this dose is only necessary for children aged 12 through 59 months regardless of risk, or age 60 through 71 months with any risk, who received 3 doses before age 12 months.Inactivated poliovirus
6 weeks
**4 weeks**
**4 weeks**
if current age is <4 years.**6 months**
(as final dose) if current age is 4 years or older.
**6 months**
(minimum age 4 years for final dose).Measles, mumps, rubella
12 months
**4 weeks**Varicella
12 months
**3 months**Hepatitis A
12 months
**6 months**Meningococcal ACWY
2 months MenACWY-CRM
9 months MenACWY-D
2 years MenACWY-TT
**8 weeks**
See notes
See notesChildren and Adolescents Age 7 through 18 YearsVaccine
Minimum Age for Dose 1
Minimum Interval Between DosesDose 1 to Dose 2
Dose 2 to Dose 3
Dose 3 to Dose 4Meningococcal ACWY
Not Applicable (N/A)
**8 weeks**Tetanus, diphtheria; tetanus, diphtheria, and acellular pertussis
**7 years**
**4 weeks**
**4 weeks**
if first dose of DTaP/DT was administered before the 1st birthday.**6 months (as final dose)**
if first dose of DTaP/DT or Tdap/Td was administered at or after the 1st birthday.
**6 months**
if first dose of DTaP/DT was administered before the 1st birthday.Human papillomavirus
9 years
**Routine dosing intervals are recommended.**Hepatitis A more info icon.
N/A
**6 months**Hepatitis B
N/A
**4 weeks**
**8 weeks *and* at least 16 weeks after first dose.**Inactivated poliovirus
N/A
**4 weeks**
**6 months**
A fourth dose is not necessary if the third dose was administered at age 4 years or older and at least 6 months after the previous dose.
A fourth dose of IPV is indicated if all previous doses were administered at <4 years or if the third dose was administered <6 months after the second dose.Measles, mumps, rubella
N/A
**4 weeks**Varicella
N/A
**3 months** if younger than age 13 years.**4 weeks** if age 13 years or older.Dengue
9 years
**6 months**
**6 months**Top of Page
							
					
							Last Reviewed:  February 10, 2023						Source: 	National Center for Immunization and Respiratory Diseases
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For Healthcare Providersminus icon
Child & Adolescent Immunization Schedule
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Schedule Changes & Guidance
Resourcesplus icon
Schedule-Related Resources
Catch-up Immunization Schedule for Children and Adolescents Who Start Late or Who Are More than 1 Month Behind, 2023
For You and Your Familyplus icon
Schedule for Infants and Children (Birth – 6 Years)
Schedule for Preteens and Teens (7 Years – 18 Years)


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