Cherie,

Finally got a call back from a Robert Dixon in BiogenIdec Investor Relations to discuss the number of patients reported on Tysabri in their earnings slides.

The number of patients reported at 1 year, 18 months, and 2 years of Tysabri are patients since relaunch of the drug. The numbers do not include the patients from the original registration trials.

The total number of patients ever exposed to Tysabri does include the original trial and original commercial launch patients.

A bit of apples and oranges.

BiogenIdec has also instituted weekly reporting of confirmed PML cases on their web site. The status as of 1/09/09 listed the 4 PML cases reported to date so no new PML cases as of today.

Chris