The present invention provides humanized, chimeric and human anti CD74 antibodies, 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 diagnosis of B cell disorders, such as B cell malignancies, other malignancies in which the cells are reactive with CD74, and {TAIL ~ autoimmune diseases}, and methods of {HEAD ~ treatment} and diagnosis 
The present invention provides humanized , chimeric and human anti CD74 antibodies , 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 diagnosis of B cell disorders , such as B cell malignancies , other malignancies in which the cells are reactive with CD74 , and { TAIL ~ autoimmune diseases } , and methods of { HEAD ~ treatment } and diagnosis
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