Multiple sclerosis (MS) is a complex and multifaceted neurological disorder. While MS has a genetic component, it is not a classic genetic disease. For this reason, a large amount of research has been done to identify environmental factors that may also be involved. In this episode, host Brett Drummond of MSTranslate talks with Emmanuelle Waubant, Professor of Neurology and Paediatrics at the University of California, San Francisco, about the latest findings on the role that environmental, genetic, and epigenetic risk factors play in MS.