For several decades the unsolved etiogenetic and therapeutic problems of multiple sclerosis have offered the strongest challenge to research in neu- rology. The hope of decisive theoretical and practical progress increased when an experimental model presenting far-reaching conformity of structural and pathogenetic features was developed, namely chronic re- lapsing experimental allergic encephalomyelitis (CREAE). During the past years, Dr. Lassmann has contributed substantially to the adaptation of this model with the aim of comprehensive evaluation, thoroughly fol- lowing up his own ideas in...