CAMBRIDGE, Mass.--(BUSINESS WIRE)--Data from an observational phase IV study of 499 patients entitled The Swiss MS Skin Project show that multiple sclerosis (MS) patients taking AVONEX (interferon beta-1a IM) reported significantly fewer injection site reactions (ISRs) compared to patients on Betaferon® (interferon beta-1b), Copaxone® (glatiramer Acetate) or Rebif ® (interferon beta-1a). The study also showed AVONEX patients were less likely to have missed a dose due to an injection site reaction in the four weeks prior to first assessment than those patients on other interferon therapies. These data were presented as a poster at the 25th Annual European Committee for Treatment and Research in Multiple Sclerosis (ECTRIMS) meeting in Düsseldorf, Germany.