Immune response

The body’s immune system response that defends against attacks from disease-causing agents. The body can produce two different immune responses – humoral immunity and cell-mediated immunity.

Immunity

The resistance to an infectious disease agent that can be developed by prior exposure to the pathogen or through vaccination

Immunogen

A substance that produces an immune response

Immunogenicity

The ability of an antigen to elicit an immune response

Immunoreactive

Participating in an immune response, such as by reacting with a specific antibody, as determined by some immunological assay or technique