Patients with multiple sclerosis treated with natalizumab may rarely develop progressive multifocal leukoencephalopathy (PML), a serious and often fatal disease caused by infection with JC virus. The ...

Patients with multiple sclerosis (MS) should be evaluated before, and regularly during, treatment with fingolimod (Gilenya, Novartis) to identify signs and symptoms possibly linked to progressive ...

Another case of a potentially fatal brain infection has been reported in a patient taking the multiple sclerosis drug Tysabri, the biotech who developed the drug announced yesterday. This is the ...

Following discontinuation of another MS medication associated with PML, lower PML-related mortality and morbidity have been reported in patients who were initially asymptomatic at diagnosis compared ...

Biogen Idec Inc. and Elan Corp. plc reported two new cases of PML — though not much else, to the chagrin of investors and analysts — linked to multiple sclerosis therapy Tysabri (natalizumab), ...

Poster Presentation Title: No Association between Decreases in Serum Immunoglobulin Levels and Serious Infections with Long-Term Ublituximab Treatment in Patients with Relapsing Multiple Sclerosis ...