The incomplete antigen is a nonprotein foreign substance that can evoke an immune response by combining whit one of the body proteins (where this combination acts as an antigen).
When a tissue structure is considered antigenic is called autoantigen and leads to an autoimmune disease.
The antibodies are proteins secreted by plasma cells,called immunoglobulins.
Immunity-is a useful reaction against living irritants resulting in their elimination.
Hypersensitivity-a hurmful reaction against living irritants (bacteria,virus,etc) or non living irritants (such as food proteins,dust,pollens,drugs,etc) leading to tissue destruction.
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