attenuated

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attenuated

adjective Medtalk
1. Reduced in virulence or infectivity.
2. Thin, minimal, markedly reduced or decreased.

attenuated

Weakened or reduced, and so altered in characteristics so as no longer to be dangerous. The term is applied to organisms that have been specially cultured so as to reduce their virulence and make them suitable for use in vaccines.

Attenuated

Alive but weakened; an attenuated microorganism can no longer produce disease.
Mentioned in: Tuberculin Skin Test