| Refractoriness: |
The pathogen is unable to infect the organism in question.The latter is not susceptible and cannot be designated as a host.
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| Resistance: |
Survival of a susceptible host in the presence of a potentiallyletal pathogen.
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- Non-specific resistance: mechanically conditioned or by physiological characterstics of the host.
- Specific or reactive resistance: adaptively increasing by activation of a particular organ system.
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- innnate (reactive) resistance: immediately starting but only temporarily active. Its effectivity is pheno- and genotypically variable.
In invertebrates attributable to the internal defence system (IDS).
In vertebrates contradictorily called "innate immunity".
Inherited but not memorized
- acquired (reactive) resistance: starting initially after a period of latency but subsequently being immediately activated by an "immune response" correctly designed as "protective immunity".
Memorized but not inherited
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