McDonald’s says onions from California-based company are linked to E. coli outbreak NPROnions Recalled in Deadly E.Coli Outbreaks Linked to McDonald’s Quarter Pounders The New York TimesThe list of fast-food places pulling onions over E. coli concerns just keeps growing Business InsiderInvestigation Update: E. coli Outbreak, McDonald’s Quarter Pounders – October 22, 2024 CDCFirst lawsuit filed against McDonald’s over its E. coli outbreak CNN