What does immunogenicity mean?
Immunogenicity is the capacity of a substance to provoke an immune response. Substances with high immunogenicity can prompt the immune system to produce antibodies, activate specialized immune cells, or otherwise mount a defensive response. The term is especially important in vaccine research, where a successful vaccine must not merely expose the immune system to a pathogen or antigen but induce a response strong and durable enough to provide protection. Immunogenicity can vary among related substances, strains, delivery methods, and populations. It also differs from antigenicity: antigenicity concerns whether a substance is recognized by immune components, while immunogenicity more specifically concerns whether that recognition produces an immune response. Because of its clinical and public-health significance, immunogenicity is used to evaluate vaccines, compare immune responses, and investigate why some immunizing treatments work more effectively than others.
nounThe capacity of a substance, such as an antigen, vaccine, or pathogen, to provoke an immune response.
- The capacity of a substance to provoke an immune response.
"Researchers compared the immunogenicity of the two vaccine candidates in preclinical studies."
"Researchers compared the immunogenicity of the two vaccine candidates in preclinical studies."
"The mutant strain showed unexpectedly low immunogenicity, limiting its usefulness as a vaccine target."
This plural is grammatical but rarely used in ordinary scientific prose; immunogenicity is normally treated as a mass noun.
"The researchers compared the immunogenicities of the modified and unmodified proteins."
Immunogenicity is the difference between the immune system recognizing a substance and actually being set in motion by it.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does immunogenicity come from?
Immunogenicity was formed in English by adding the suffix “-ity” to “immunogenic,” a term associated with “immune” and the productive combining form “-genic.” Its vocabulary ultimately derives from Latin immunis, meaning “free from” or “exempt,” which developed into forms such as immunity and immunize. The suffix “-genic” has roots in Greek elements associated with producing or generating. Cognate words in English include immune, immunity, immunize, and immunology.
Related word forms
How immunogenicity is actually used
A specialized formal term used chiefly in immunology, vaccinology, pharmacology, and related biomedical fields. It normally describes a measurable property rather than the immune response itself.
Easily confused with immunogenicity
Antigenicity refers primarily to the ability of a substance to be recognized by the immune system, whereas immunogenicity more specifically concerns its ability to induce an immune response.