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disease (n.)> a disorder of structure or function in a human, animal, or plant, especially one that produces specific signs or symptoms or that affects a specific location and is not simply a direct result of physical injury.
Why do you consider aging not a disease? AFAICT, the degradation and signs it causes seem to tick the definitional boxes.
I was surprised to see this opinion originating from you, @Comevius. I've grown accustomed to finding myself in violent agreement with ye. :)