Español | Other Languages

Catch-up Immunization Schedule for Children and Adolescents Who Start Late or Who Are More than 1 Month Behind, 2023

Recommendations for Ages 18 Years or Younger, United States, 2023

Print

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 Years

Vaccine	Minimum Age for Dose 1	Minimum Interval Between Doses
Vaccine	Minimum Age for Dose 1	Dose 1 to Dose 2	Dose 2 to Dose 3	Dose 3 to Dose 4	Dose 4 to Dose 5
Hepatitis 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 1^st 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 1^st birthday, and second dose was administered at younger than 15 months; OR if both doses were PedvaxHIB^® and were administered before the 1^st birthday	8 weeks (as final dose) This dose only necessary for children age 12 through 59 months who received 3 doses before the 1^st 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 1^st birthday. 8 weeks (as final dose for healthy children) if first dose was administered at the 1^st 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 notes

Children and Adolescents Age 7 through 18 Years

Vaccine	Minimum Age for Dose 1	Minimum Interval Between Doses
Vaccine	Minimum Age for Dose 1	Dose 1 to Dose 2	Dose 2 to Dose 3	Dose 3 to Dose 4
Meningococcal 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 1^st birthday. 6 months (as final dose) if first dose of DTaP/DT or Tdap/Td was administered at or after the 1^st birthday.	6 months if first dose of DTaP/DT was administered before the 1^st birthday.
Human papillomavirus	9 years	Routine dosing intervals are recommended.
Hepatitis A	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