What does immunogenic mean?
Immunogenic means capable of provoking an immune response. The term is especially common in immunology and vaccinology, where researchers evaluate whether a vaccine component, altered virus, peptide, or other biological material can stimulate the immune system. An immunogenic substance is typically recognized as foreign, potentially causing B cells to produce antibodies and T cells to become activated. The word does not mean that a response is guaranteed to be strong, safe, or effective: immunogenicity describes the capacity to trigger immunity, while protection and adverse effects require separate assessment. “Highly immunogenic,” for example, indicates that a substance elicits a comparatively strong response. The related noun immunogenicity names the property itself. Immunogenic is also often discussed alongside antigenic, but the two concepts are not identical: antigenic focuses on recognition by the immune system, while immunogenic emphasizes the ability to provoke a response.
adjectiveCapable of provoking an immune response. An immunogenic substance or cell can stimulate the immune system to recognize it as foreign and mount a defensive response.
- Capable of eliciting an immune response.
"The vaccine was highly immunogenic, producing strong protective antibodies in most recipients."
"Researchers identified a peptide that proved strongly immunogenic in laboratory tests."
"The altered virus remained immunogenic, although its ability to replicate had been reduced."
Immunogenic is the scientific way of saying that something makes the immune system sit up and take notice.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does immunogenic come from?
Immunogenic combines immuno-, derived from Latin immunis, meaning “free from” or “exempt,” with the combining form -genic, meaning “producing” or “originating.” These elements were brought together in the modern scientific sense of “able to stimulate an immune response.” Its relatives include immunity, immunology, antigen, and pathogen, all of which draw on the same historical association with exemption and resistance to disease.
Related word forms
How immunogenic is actually used
Primarily used in immunology, vaccinology, and biomedical research. It describes capacity to trigger a response, not the response itself, and is usually attributed to a substance, cell, vaccine, or other biological material.
Easily confused with immunogenic
An antigen is a substance recognized by the immune system, whereas an immunogenic substance is one capable of provoking an immune response.