Thank you for your clarifications,just for the record i totally disagree on your last statement as Enterovirus being the "singular cause" of ME/CFS
But that's not to deny there may be other causes, such EBV. Several studies have shown that around 10% of patients who get mononucleosis will go on to develop ME/CFS. So that seems to link EBV to ME/CFS quite convincingly.
Incidentally, one study found EBV can also form a non-cytolytic infection.