Litigation is in a very early stage. Currently, Aduhelm victims will be bringing individual lawsuits against Biogen for their ARIA symptoms. But it is expected that these lawsuits will eventually join into a multi-district litigation (MDL). MDLs are a way to expedite litigation - and settlements - by having one federal judge oversee the pretrial process for all the cases. Eventually a few cases will go to trial. The results of these bellwether trials will serve as the starting point for negotiations with the rest of the plaintiffs.