autoimmunization
/ˌɔːtəʊɪmjʊnʌɪˈzeɪʃn/(also autoimmunisation) Medicine
noun
1The production or enhancement of the natural immune response to a pathogen or foreign substance already present in the body; an instance of this. Now rare.
2The production or development of autoimmunity.
Origin
Late 19th century; earliest use found in Boston Medical and Surgical Journal. From auto- + immunization, after either German Autoimmunisirung or its synonym Autoimmunisation.