Tysabri Risk & Litigation Archive

Curated reference pages covering Tysabri adverse-event evidence, causation analysis, and claim-eligibility screening across associated conditions.

Progressive Multifocal Leukoencephalopathy

  1. Causation: Does Tysabri cause Progressive Multifocal Leukoencephalopathy
  2. Prognosis: Long term outcome of Progressive Multifocal Leukoencephalopathy after Tysabri