Catch-up Immunization Schedule for Children and Adolescents Who Start Late or Who Are More than 1 Month Behind, 2022
Recommendations for Ages 18 Years or Younger, United States, 2022
The tables below provide catch-up schedules and minimal intervals between doses for children based on age whose vaccinations have been delayed.
| 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 | ||
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 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 |
|
| 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 only necessary for children age 12 through 59 months who received 3 doses before age 12 months or for children at high risk who received 3 doses at any age. |
|
| 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 | |||
|---|---|---|---|---|---|
| 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 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 |
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. |
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| Dengue |
9 years | 6 months | 6 months | ||