I don't care much about your 2 cents, I own eln as well, but why you seem to have to post to put down this stock is beyond me, you don't own this stock, so why act like a basher when I see how many people on the eln board complain about bashers? You just made a good point, you will switch from copaxone, not Avonex, and so will thousands, those are revenue BiiB didn't have before, don't think combo was that big in the first place, Crohn's and switchers from other drugs will offset whatever miniscule amount you think is the difference.
You do seem narrow minded when it comes to investing, didn't do enough DD about biib, so don't claim you know 2 cents.
Disclosure. Long in ELN, not in BIIB. But, it is my humble opinion that it is true that Tysabri will cut avonex sales dramatically, but the BIIB will make more on 1/2 of Tysabri than it does (for M.S.) on all of avonex.
So, sit tight, BIIBer's. A lot of ELN holders blame BIIB for this little T fiasco, and some are convinced BIIB would do anything to keep avonex in the M.S. market. While a little cynicism and paranoia is always good for the market .....