Answer
Progressive multifocal leukoencephalopathy is a very rare, life-threatening brain infection. New memory loss, speech difficulty, weakness, walking problems or eyesight changes need urgent specialist assessment.
Sources for this answer
- Gazyvaro 1,000 mg concentrate for solution for infusion — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.