Risk of infection increasing years on Ocrevus?

Hello! So as the title suggests, I had a question around infections and time on Ocrevus. I’ve been on the drug for just over 3 and a half years now. Was doing ok in terms of general illness, had covid twice with no drama. The last few months however I’ve been taken down quite badly with a viral gastrointestinal infection, I was very ill for two weeks, and recently a cold that just seemed to drag out after my treatment.

I think when I started the drug the MS nurse did say risk of infections can increase the longer you are on it, but I can’t remember exact details! Does anyone know or have experience with this?

Have you found the longer you are on it, the more ill you are getting when you do pick up things?