What we know about the McDonald’s E. coli outbreak investigation – CNN

What we know about the McDonald’s E. coli outbreak investigation  CNNMcDonald’s pulls Quarter Pounders from 20% of all US locations after deadly E. Coli outbreak  New York Post Quarter Pounders are off the menu at 20% of McDonald’s in US amid an E. coli investigation  The Associated PressMcDonald’s, Food Safety Officials Scrutinize Onions in E. Coli Outbreak  The Wall Street JournalTop food safety lawyer says his phones are ‘ringing off the hook’ after McDonald’s E. coli outbreak  Business Insider