if you look at the data from the clinical trial of T and avonex it doesn't look like the addition of avonex to T caused any reduction in relapse rate - it was actually significantly higher in the avonex + tysabri group compared to the tysabri alone group but that was because the patients treated in the avonex + tysabri group were supposed to be sicker - my guess is tha avonex does not add anything to tysabri and I will be posting some interesting information about that in a short time