Fierce Pharma Fierce Biotech Fierce Healthcare Fierce Life Sciences Events Advertise About Us Pharma Vaccines Asia Cell & Gene Therapy Drug Delivery Executives Manufacturing Facilities Recalls Warning Letters Marketing Special Reports Fierce 50 Special Report Awards Gala Resources Podcasts Fierce Events Industry Events Webinars Whitepapers Survey Events Subscribe Subscribe Pharma Vaccines Asia Cell & Gene Therapy Drug Delivery Executives Manufacturing Facilities Recalls Warning Letters Marketing Special Reports Fierce 50 Special Report Awards Gala Resources Podcasts Fierce Events Industry Events Webinars Whitepapers Survey Events Subscribe Fierce Pharma Fierce Biotech Fierce Healthcare Fierce Life Sciences Events Advertise About Us Pharma Researchers identify Tysabri-PML link By Tracy Staton Sep 10, 2009 11:20am The multiple sclerosis drug Tysabri awakens a virus that causes a rare brain disease, not only suppressing the body's ability to fight it but making the virus stronger, U.S. researchers found. Report