In the process of causing or developing an immune response against one's own body tissues.
Present participle of 'autoimmunize,' from Greek 'auto' (self) and Latin 'immunis' (exempt). Used in medical and scientific contexts since the mid-20th century.
An autoimmunizing response can be triggered by infections, medications, or even sunlight in some people—which is why scientists study what exactly 'flips the switch' on self-attack.
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