I'm in the infusion room now getting #28. First infusion post negative JCV antibody test! It's nice to have a relief from the anxiety of PML, at least for now. Will get another test at the end of October. I'm now switching to every 7 weeks instead of every 8 weeks since the Tysabri seems to start wearing off around week 6. Hopefully I can keep the UTIs in check. Hope everyone is doing well!