Resource Guide: Scientific evidence connecting Tysabri to Progressive Multifocal Leukoencephalopathy

This page collects vetted references on medical safety, regulatory guidance, and clinical background for anyone researching this topic.

Primary topic reference

Scientific evidence connecting Tysabri to Progressive Multifocal Leukoencephalopathy — detailed background and analysis.

Mayo Clinic — Diseases & Conditions

Reference: Mayo Clinic — Diseases & Conditions

Authoritative source for clinical, regulatory, and public-health background reading.

U.S. Food and Drug Administration (FDA)

Reference: U.S. Food and Drug Administration (FDA)

Authoritative source for clinical, regulatory, and public-health background reading.

MedlinePlus — Trusted Health Information

Reference: MedlinePlus — Trusted Health Information

Authoritative source for clinical, regulatory, and public-health background reading.