Autoimmune diseases in humans are divided into two categories namely organ-specific and non-organ specific auto-immune diseases. The organ-specific immune disease is mostly directed against one organ. The functions performed by the organ are blocked by the antibodies produced.
Eg: Hashimoto’s thyroiditis, Grave’s disease, and Addison’s disease (adrenal gland).
The non-organ specific disorders are otherwise known as systemic disorders in which autoimmune activity is widely spread throughout the body.
Eg: Rheumatoid arthritis and multiple sclerosis.