U.S. doctors online nowAsk doctors free
A 33-year-old member asked:

Can a child catch up or substitute 2 doses of dtp vaccines for 1 delayed dose of td vaccine?

2 doctor answers4 doctors weighed in
Dr. Gregory Mosolf
Pediatrics 26 years experience
Not sure: I'm not sure i understand the question. If the 8 year old child has 3 dtap shots (so they are missing 2), and the pediatrician gives one tdap (not td) that should bring their vaccines up to date.
Created for people with ongoing healthcare needs but benefits everyone.
Dr. James Ferguson
Pediatrics 47 years experience
I wouldn't: The formulation of td has a reduced antigen load designed for those who are older.It is seldom used today except in some emergency rooms and limited to older kids and adults.It reduces sensitivity reactions to the shot.The DTaP has a higher antigen load and can trigger more swelling and redness in older patients. I never use it over age 5.One dose would be enough to cover the need, but I wouldn't
Created for people with ongoing healthcare needs but benefits everyone.

Related questions

A 38-year-old member asked:
Is the td/ipv vaccine vegetarian compliant?
1 doctor answer3 doctors weighed in
A 28-year-old female asked about a female:
Mild fever 5 days after DTP, Pnuemococal,and rotavirus vaccine. she 3m old. is it ok?
2 doctor answers6 doctors weighed in
A 33-year-old member asked:
What convincing evidence is there for DTP vaccine's value?
3 doctor answers4 doctors weighed in
Last updated Sep 30, 2019

Disclaimer:

Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.