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<p>in brain structures. In MS, B cells may be involved, revealed by the presence of certain antibodies (<a href="page.php?w=Oligoclonal_band">oligoclonal IgG bands</a>) commonly found in the spinal fluid of people with MS.</p>

<p><big> Infectious agents </big></p>
<p>Early evidence suggested the association between several viruses with human demyelinating <a href="page.php?w=encephalomyelitis">encephalomyelitis</a>, and the occurrence of demyelination in animals caused by some viral infections. One such virus, <a href="page.php?w=Epstein-Barr_virus">Epstein-Barr</a></p><p>
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