PML Found in Ocrevus-Treated Patient Who Had Used Tysabri for 3 Previous Years
A multiple sclerosis (MS) patient treated in Germany with Ocrevus (ocrelizumab) has developed the dreaded brain infection progressive multifocal leukoencephalopathy (PML). But it is not clear whether the recently approved Genentech/Roche-developed treatment is the cause. The patient took the last dose of a three-year course of Tysabri (natalizumab) in February. Tysabri is…