Has anyone been on Ocrevus for any length of time now? Have you had any side effects? I am so concerned with PML. I had Encephalitis in 1989. I was hospitalized for 14 days with IV drugs and I was very sick. Comatose, delusional, I don't remember much of it and probably best I didn't. I don't want to go threw anything like that again. My Dr. has suggested I try Ocrevus for my PPMS. Even though they say this is rare, and my understanding no one has gotten this from the Ocrevus drug, I am concerned.