Immunization Schedule For Children And Adolescents Aged 18 Years Or Younger Page 3
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8FIGURE 2. Catch-up immunization schedule for persons aged 4 months through 18 years who start late or who are more than 1 month
behind—United States, 2017.
The figure below provides catch-up schedules and minimum intervals between doses for children whose vaccinations have been delayed. A vaccine series does not need to be restarted, regardless of the time that has elapsed between
doses. Use the section appropriate for the child’s age. Always use this table in conjunction with Figure 1 and the footnotes that follow.
Children age 4 months through 6 years
Minimum
Minimum Interval Between Doses
Vaccine
Age for
Dose 1 to Dose 2
Dose 2 to Dose 3
Dose 3 to Dose 4
Dose 4 to Dose 5
Dose 1
8 weeks
Hepatitis B
1
Birth
4 weeks
and at least 16 weeks after first
dose.
Minimum age for the final dose is 24 weeks.
2
2
Rotavirus
6 weeks
4 weeks
4 weeks
Diphtheria, tetanus, and
3
6 weeks
4 weeks
4 weeks
6 months
6 months
3
acellular pertussis
4
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) or
unknown.
4 weeks
8 weeks
4
and age 12 through 59 months (as final dose)
if first dose was administered before the 1
st
birthday.
• if current age is younger than 12 months
8 weeks (as final dose)
and first dose was administered at age 7 through 11 months;
Haemophilus influenzae
8 weeks (as final dose)
This dose only necessary for children age 12
6 weeks
OR
4
type b
if first dose was administered at age 12
through 59 months who received 3 doses
• if current age is 12 through 59 months
through 14 months.
before the 1
st
birthday.
and first dose was administered before the 1
birthday, and second dose adminis-
st
No further doses needed
if first dose was
tered at younger than 15 months;
administered at age 15 months or older.
OR
• if both doses were PRP-OMP (PedvaxHIB; Comvax)
and were administered before the 1
st
birthday.
No further doses needed
if previous dose was administered at age 15 months or older.
4 weeks
4 weeks
if first dose administered before the 1
st
if current age is younger than 12 months and previous dose given at <7 months old.
birthday.
8 weeks (as final dose)
8 weeks (as final dose for healthy children)
8 weeks (as final dose for healthy children)
This dose only necessary for children aged
if previous dose given between 7-11 months (wait until at least 12 months old);
5
Pneumococcal
6 weeks
if first dose was administered at the 1
st
12 through 59 months who received 3 doses
OR
birthday or after.
before age 12 months or for children at high
if current age is 12 months or older and at least 1 dose was given before age 12 months.
risk who received 3 doses at any age.
No further doses needed
No further doses needed
for healthy children if previous dose administered at age 24
for healthy children if first dose was admin-
months or older.
istered at age 24 months or older.
6
6
6
6
Inactivated poliovirus
6 weeks
4 weeks
4 weeks
6 months
(minimum age 4 years for final dose).
Measles, mumps, rubella
8
12 months
4 weeks
Varicella
9
12 months
3 months
10
Hepatitis A
12 months
6 months
11
Meningococcal
(Hib-MenCY ≥6 weeks;
6 weeks
8 weeks
11
See footnote 11
See footnote 11
MenACWY-D ≥9 mos;
MenACWY-CRM ≥2 mos)
Children and adolescents age 7 through 18 years
11
Meningococcal
Not Applicable
(MenACWY-D ≥9 mos;
8 weeks
11
(N/A)
MenACWY-CRM ≥2 mos)
4 weeks
Tetanus, diphtheria;
if first dose of DTaP/DT was administered before the 1
st
birthday.
6 months
if first dose of DTaP/DT was
12
tetanus, diphtheria, and
7 years
4 weeks
administered before the 1
st
birthday.
6 months (as final dose)
12
acellular pertussis
if first dose of DTaP/DT or Tdap/Td was administered at or after the 1
st
birthday.
13
13
Human papillomavirus
9 years
Routine dosing intervals are recommended.
10
Hepatitis A
N/A
6 months
1
Hepatitis B
N/A
4 weeks
8 weeks
and at least 16 weeks after first dose.
6
6
6
Inactivated poliovirus
N/A
4 weeks
4 weeks
6 months
Measles, mumps, rubella
8
N/A
4 weeks
3 months
if younger than age 13 years.
9
Varicella
N/A
4 weeks
if age 13 years or older.
NOTE: The above recommendations must be read along with the footnotes of this schedule.
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