adjuvants

Aluminum derivatives that are added to killed vaccines to generate more of an immune response than the killed vaccine alone would.
Found on http://www.vetmed.wsu.edu/glossary/glossary.asp

Adjuvants

substances that augment, stimulate, activate, potentiate, or modulate the immune response at either the cellular or humoral level. The classical agents contain bacterial antigens and some are endogenous (e.g., histamine, interferon, transfer factor, tuftsin, interleukin-1). Their mode of action is either non-specific, resulting in increased immune ...
Found on http://www.encyclo.co.uk/local/22239
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