The present invention provides humanized, chimeric and human anti CD74 antibodies, {HEAD ~ CD74 antibody fusion proteins}, immunoconjugates, vaccines and bispecific that bind to CD74, the major histocompatibility complex class II invariant chain, Ii, which is useful for the treatment and {TAIL ~ diagnosis} of B cell disorders, such as B cell malignancies, other malignancies in which the cells are reactive with CD74, and autoimmune diseases, and methods of treatment and diagnosis 
The present invention provides humanized , chimeric and human anti CD74 antibodies , { HEAD ~ CD74 antibody fusion proteins } , immunoconjugates , vaccines and bispecific that bind to CD74 , the major histocompatibility complex class II invariant chain , Ii , which is useful for the treatment and { TAIL ~ diagnosis } of B cell disorders , such as B cell malignancies , other malignancies in which the cells are reactive with CD74 , and autoimmune diseases , and methods of treatment and diagnosis
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