Of all the viruses EBV is the clear leader of the pack as being the most likely cause of MS. Could a specific strain of EBV cause MS? A superficial look at has not revealed obvious difference between EBV strains in people with MS and control subjects.
Opinion: a deeper look is required before abandoning the possibility that a specific strain may cause the disease. The million dollar question is how and where to look?
I had mono for 4 straight years in High School. I had constant blood test. I know this is why I have M.S. People who have had mono would be a good place to look. There are many others who feel this is the reason for there MS