Catch-Up Guidance for Children
4 Months through 6 Years of Age
Diphtheria-, Tetanus-, and Pertussis-Containing Vaccines: DTaP/DT1
The table below provides guidance for children whose vaccinations have been delayed. Start with the
child’s age and information on previous doses (previous doses must be documented and must meet
minimum age requirements and minimum intervals between doses). Use this table in conjunction with
table 2 of the Recommended Child and Adolescent Immunization Schedule for Ages 18 Years or Younger,
found at www.cdc.gov/vaccines/schedules/hcp/child-adolescent.html.
AND # of
IF current
previous doses AND THEN Next dose due
age is
of DTaP or DT is
Unknown or 0
Give Dose 1
(DTaP) today
Give Dose 2 (DTaP) at least
4 weeks after Dose 1
It has been at least Give Dose 2 (DTaP) Give Dose 3 (DTaP) at least
4 weeks since Dose 1 today 4 weeks after Dose 2
1
4 months It has not been at least Give Dose 2 (DTaP) at least
No dose today
through 4 weeks since Dose 1 4 weeks after Dose 1
11 months
Give Dose 4 (DTaP) at least
It has been at least Give Dose 3 (DTaP)
6 calendar months after Dose 3
4 weeks since Dose 2 today
2 and at 15 months of age or older2
It has not been at least Give Dose 3 (DTaP) at least
No dose today
4 weeks since Dose 2 4 weeks after Dose 2
Unknown or 0
Give Dose 1 (DTaP)
today
Give Dose 2 (DTaP) at least
4 weeks after Dose 1
It has been at least Give Dose 2 (DTaP) Give Dose 3 (DTaP) at least
4 weeks since Dose 1 today 4 weeks after Dose 2
1
It has not been Give Dose 2 (DTaP) at least
No dose today
4 weeks since Dose 1 4 weeks after Dose 1
It has been at least Give Dose 3 (DTaP) Give Dose 4 (DTaP) at least
4 weeks since Dose 2 today 6 calendar months after Dose 3
2
1 through It has not been Give Dose 3 (DTaP) at least
No dose today
3 years 4 weeks since Dose 2 4 weeks after Dose 2
If 12 through 14
Give Dose 4 (DTaP) at
months of age,
It has been at least 15 through 18 months of age
no dose today2
6 calendar months
since Dose 3 If 15 months of age Give Dose 5 (DTaP) at least
3 or older, give Dose 4 6 months after Dose 4 and at
(DTaP) today 4 through 6 years of age
It has not been
Give Dose 4 (DTaP) at least
6 calendar months No dose today
6 months after Dose 3
since Dose 3
1
Vaccine information: DTaP–Administer to children 6 weeks through 6 years of age without a contraindication or precaution to diphtheria,
tetanus, or pertussis vaccine. DTaP products include Daptacel, Kinrix, Infanrix, Pediarix, Pentacel, and Quadracel. Use the correct product
based on the approved age indications. DT–Administer to children 6 weeks through 6 years of age with a contraindication to pertussis
vaccine.
2
The fourth dose may be administered as early as age 12 months, provided at least 6 months have elapsed since the third dose.
Reference: Recommended Child and Adolescent Immunization Schedule for
Ages 18 Years or Younger—United States, 2019. www.cdc.gov/vaccines/
schedules/downloads/child/0-18yrs-child-combined-schedule.pdf
Revised January 2019
1 CS249275-M
Catch-Up Guidance for Children
4 Months through 6 Years of Age
Diphtheria-, Tetanus-, and Pertussis-Containing Vaccines: DTaP/DT1
AND # of
IF current previous
AND AND THEN Next dose due
age is doses of DTaP
or DT is1
Unknown
or 0 Give Dose 1
(DTaP) today
Give Dose 2 (DTaP) at least
4 weeks after Dose 1
1
It has been at least
4 weeks since Dose 1 Give Dose 2
(DTaP) today
Give Dose 3 (DTaP) at least
4 weeks after Dose 2
It has not been
4 weeks since Dose 1 No dose today
Give Dose 2 (DTaP) at least
4 weeks after Dose 1
It has been at least
4 weeks since Dose 2 Give Dose 3
(DTaP) today
Give Dose 4 (DTaP) at least
6 calendar months after Dose 3
2 It has not been at
least 4 weeks since
Dose 2
No dose today
Give Dose 3 (DTaP) at least
4 weeks after Dose 2
It has been at least
4 through
6 years
6 calendar months
since Dose 3
Give Dose 4
(DTaP) today
Give Tdap at 11 to 12 years of
age
3
It has not been at
least 6 calendar
months since Dose 3
No dose today
Give Dose 4 (DTaP) at least
6 calendar months after Dose 3
It has not been
Give Dose 5 (DTaP) at least
at least
No dose today 6 calendar months after
All doses were 6 months since
Dose 4
given prior to the Dose 4
4th birthday It has been at
4 Give Dose 5
least 6 months
(DTaP) today
since Dose 4 Give Tdap at 11 to 12 years
At least one dose was of age
given at/after the
4th birthday
No dose today
1
Vaccine information:DTaP–Administer to children 6 weeks through 6 years of age without a contraindication or precaution to diphtheria,
tetanus, or pertussis vaccine. DTaP products include Daptacel, Kinrix, Infanrix, Pediarix, Pentacel, and Quadracel. Use the correct product
based on the approved age indications. DT–Administer to children 6 weeks through 6 years of age with a contraindication to pertussis
vaccine.
Reference: Recommended Child and Adolescent Immunization Schedule for Ages 18 Years or Younger—United States, 2019.
www.cdc.gov/vaccines/schedules/downloads/child/0-18yrs-child-combined-schedule.pdf
Revised January 2019
2 CS249275-M
