Biomarker development and discovery have been an important point in multiple sclerosis (MS) research for many years. In this podcast, Elias Sotirchos, MD, Johns Hopkins University School of Medicine, Baltimore, MD; Ferhan Qureshi, VP – Biomarker Product Development, Octave, Menlo Park, CA; and Shane Arsenault, MD, Memorial University of Newfoundland, St. John’s, Canada, discuss recent updates on the development and validation of biomarkers that can predict disability progression, monitor ongoing disease activity, and assess treatment response.