Final answer:
An example of an autoimmune disease includes type 1 diabetes, Graves' disease, and systemic lupus erythematosus, all of which involve the immune system attacking the body's own cells.
Step-by-step explanation:
Autoimmune diseases represent a malfunction of the immune system in which the body's own immune response attacks its cells and tissues. Examples of autoimmune disease include type 1 diabetes, where the immune system targets and destroys insulin-producing cells in the pancreas, Graves' disease, which affects the thyroid gland, and systemic lupus erythematosus (SLE), a condition where multiple organs and tissues may be involved. Each of these diseases occur because the immune system fails to recognize certain cells or tissues as "self" and, instead, erroneously treats them as foreign invaders.