Hi, my partner had COVID in February 2022 and the week after that she started feeling the weakness in her legs. In a matter of months, she was completely immobile. She was diagnosed with MS in June 2022. The treatments started with Steroids, then moved to 6 doses (one every 28 days) of Tysabri (Natalizumab). She's back on her feet and doesn't have any symptoms now. She is JCV positive. The doctors have advised a transition to Rituximab. Has anyone else here moved from Tysabri to Rituximab? And how has that transition been?