Natalizumab Safety Update - February 2013

#MSBlog: February 2013 update: 331 natalizumab-related cases of PML; 23% mortality.

"As of the 5th February 2013 there have been 331 confirmed cases of natalizumab associated PML. This is on denominator of over 112,000 treated MSers with over 260,000 years of natalizumab exposure. 76 out or the 331 MSers with PML, or 23% of the cases, have died as a result of PML."

"For accurate risk profiling please refer to slide 18. This is based on JCV exposure, duration of treatment and prior use of immunosuppressive therapies."

"If you are on Natalizumab please help out by completing this survey. Thanks."

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