MND: The connection is still murky. There is circumstantial evidence of the Epstein-Barr Virus (EBV)involvement in MS, as summarized in this study  published in Journal of Neurology and Neurosurgical Psychiatry.
- Geographic patterns of occurrence of MS and EBV infection
- Strong evidence however that people with MS are more likely to report a past history of infectious mononucleosis
- High levels of Epstein-Barr virus antibodies found in the blood of many MS patients
There is controversy, because it seems there are conflicting results: Take studies  and  opposite conclusions:  says no EBV in biopsies of MS patients;  says EBV found in post-mortem of MS patients…
However, quoting the Center for Disease Control : ” EBV…one of the most common human viruses. The virus occurs worldwide, and most people become infected with EBV sometime during their lives…”
Clearly, a matter of degree: MS patients seem to have higher EBV presence. Hardly a smoking gun.
There is a nice discussion on the EBV and MS in the Harvard Focus by Jennifer Fraser . She points out that direct causality proof is not required for the research on EBV to have merit.
However, beware of the human need to pin blame on something. Auto-immune diseases are very complex, as is cancer.
To be continued…
Talk to your Doctor.
 Journal of Neurology and Neurosurgical Psychiatry; “Epstein–Barr virus and multiple sclerosis”
 Brain ; Brigham and Women’s Hospital, Boston ; “Epstein-Barr virus infection is not a characteristic feature of multiple sclerosis brain.”
 Journal of Experimental Medicine ; “Dysregulated Epstein-Barr virus infection in the multiple sclerosis brain”