noun, noun or participle which takes 'suru', intransitive verb
Medical term for reducing the virulence or potency of a pathogen, toxin, or other harmful agent. Often used in vaccine development contexts.
See also: 弱毒
In vaccine development, pathogens are sometimes attenuated before use.
このウイルス株は継代培養によって弱毒化された。
This virus strain was attenuated through serial passage.