Many serious diseases result, wholly or partially, from the body's immune system attacking the body
itself rather than the invading disease causing microbes. These diseases are called autoimmune diseases.
The immune system is very complicated and difficult to understand and these diseases have proved very
difficult to treat. Doctors and scientists using 'animal models' (animals which have the diseases) are now
making progress in their understanding of the diseases and their search for treatments and cures.
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