Biological agent

Pronunciation

Definition 1

A substance that is made from a living organism or its products and is used in the prevention, diagnosis, or treatment of cancer and other diseases. Biological agents include antibodies, interleukins, and vaccines. Also called biologic agent and biological drug. (NCI Dictionary)

Definition 2

Biotechnology-derived pharmaceutical agents made from living organisms or their products. Includes recombinant proteins, monoclonal antibodies, and nucleic acids. (NCI Thesaurus)

Definition 3

A substance made from living organisms or things they produce, for example: virus, therapeutic serum, toxin, antitoxin, vaccine, blood, blood component or derivative, allergenic product, or analogous product. (NCI Thesaurus/CDISC)

Definition 4

Complex pharmaceutical substances, preparations, or agents of organic origin, usually obtained by biological methods or assay, that depend for their action on the processes affecting immunity. They are used especially in diagnosis and treatment of disease (as vaccines or pollen extracts). Biological products are differentiated from BIOLOGICAL FACTORS in that the latter are compounds with biological or physiological activity made by living organisms. (From Webster's 3d ed) (NLM, Medical Subject Headings)

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