Library · Molecule
Adjuvant in a vaccine
Make it clearer
A vaccine carries two different things. One is the antigen: the piece of the germ, or the instructions for making it, that teaches the body what it has to defend itself against. The other, in some vaccines, is the adjuvant, a substance added so that the lesson sinks in deeper.
The adjuvant teaches nothing on its own. It travels with the antigen and makes the immune response, the body's defensive reaction, stronger and better aimed. The best known adjuvants are aluminum salts, which have been used since the 1930s and are still in everyday vaccines such as the hepatitis B vaccine.
That brings two concrete advantages. With an adjuvant, less antigen may be needed to reach the same efficacy. And the response it produces may last longer.
In brief
An adjuvant is a substance added to some vaccines to strengthen the immune response.
It does not replace the antigen, the component that triggers that response; it works alongside it, amplifying and shaping it.
The adjuvant is not the vaccine's message; it is the volume at which it is said.
Aluminum salts have been used since the 1930s and are still in vaccines such as the hepatitis B vaccine.
With an adjuvant, a vaccine can reach high efficacy with less antigen and produce a longer lasting response.
Sources (2)
- U.S. Food and Drug AdministrationCommon Ingredients in US Licensed VaccinesPublished
- National Institute of Allergy and Infectious Diseases, National Institutes of HealthVaccine AdjuvantsPublished
This page explains the topic in general terms; it does not tell anyone what treatment to follow.
Updated