I have recently learned that anti-mag neuropathy is not only caused by B cells which Rituximab wipes out, but also caused by Long-lived plasma cells (LLPCs) which Rituximab doesn't affect. They are a key part of your immune system and not easily wiped out and if they are you lose most of your immunity that you have built up over your lifetime. I've been on rituximab for a couple of years and so far it's had no effect.