Hi, Dr. Bob.
Thank you so much for taking the time to help me out!
My daughter is nearly 6 and I have been contemplating what route we should take regarding vaccine boosters. She was selectively vaxxed but on a delayed schedule from 4 months-15 months (DtaP, Hep B, Polio, HIB, Pc), and she received all doses for these vaccines until 15 months but she has never received MMR, Varicella, or Hep A. I am wondering if you knew what percentage of immunity she will have had in regard to the illnesses covered by the DtaP vaccine by this point--I'm trying to figure out if a DtaP booster is essential or if it's just icing on the cake, such as boosting immunity from, say, 95% to 98%. I'm wondering the same for the polio vaccine, which she would be getting alongside the DtaP. She has had 4 doses of DtaP and 3 Polio.
Thanks so much!
i don't know about the added protection percentage from the polio, so not sure how important that booster is. I rountinely give 4 doses in my office.
As for DTaP, the 5th booster dose definately does increase the immunity. Researchers found that with last year's increase in pertussis, many of the cases were in 8 to 12 year olds who had been fully vacinated through age 5. So, that immunity wanes. That's why they are really pushing that 12 year dose. So, based on that, your child missing the 5 year dose likely means the immunity is pretty low. A booster should raise it by alot. BUT, we can also learn from that study that even doing the booster now may only provide a few years of immunity. It would likely wear off. So, you have to decide if you feel like your child needs some good imunity from pertussis now, or just go without it.