This page collects vetted references on medical safety, regulatory guidance, and clinical background for anyone researching this topic.
FDA warning Tysabri Progressive Multifocal Leukoencephalopathy — Research Summary
A focused look at the background, context, and key sources on this subject.
Reference: Centers for Disease Control and Prevention (CDC)
Authoritative source for clinical, regulatory, and public-health background reading.
Reference: U.S. Food and Drug Administration (FDA)
Authoritative source for clinical, regulatory, and public-health background reading.
Reference: National Institutes of Health (NIH)
Authoritative source for clinical, regulatory, and public-health background reading.