Library · Physiology
Vaccine booster dose
Make it clearer
A booster is simply one more dose of the same vaccine, given after the initial one. For polio that booster comes at least six months after the first dose, and the tetanus and diphtheria booster is repeated every ten years.
The reason it is not all given in a single visit is that some vaccines need several doses weeks or months apart. That spacing is sometimes needed so the body can make lasting antibodies, the proteins that recognize the invader, and form memory cells, which are the ones that store that recognition.
That is where the payoff comes in. When the body meets the same pathogen a second time, the antibody response is faster and more effective than the first time, because those memory cells are already standing by to make antibodies. It is like having the mold already made: nobody designs it again; it simply goes back to work.
In brief
A booster is a dose given after the initial one: for polio it comes at least six months later.
Some vaccines require several doses weeks or months apart, sometimes to build lasting antibodies and memory cells.
On a second encounter with the same pathogen the antibody response is faster and more effective, because those cells are ready.
The mold is already made and simply goes back to work.
The tetanus and diphtheria booster is given every ten years.
Sources (3)
- National Center for Biotechnology Information, StatPearls PublishingPoliomyelitis, StatPearlsPublished
- World Health OrganizationHow do vaccines work?Published
- National Center for Biotechnology Information, StatPearls PublishingImmunization, StatPearlsPublished
This page explains the topic in general terms; it does not tell anyone what treatment to follow.
Updated