chronic EBV is as well understood as the causes of MS are, which means almost no understanding at all. If u found a site quoting some definitive numbers about
prognosis, ignore it, it's "fake news"
Nobody knows how to treat and manage EBV in reactivated/chronic form. The antivirals that work are few and have little effect on EBV. Generally the treatment is finding what is wrong with your immune system that allows EBV to reactivate in this way. It is a sign there is something else wrong with u. Forget about
EBV. Everbody has it, 70% of world population has EBV yet 99.9% of them are asymptomatic. Have u heard of an "EBV pandemic" ?