Nearly 50 people have become ill and one person has died, amid infections that may have been caused by slivered onions, the C.D.C. reported. Nearly 50 people have become ill and one person has died, amid infections that may have been caused by slivered onions, the C.D.C. reported. McDonald’s Corporation, Centers for Disease Control and Prevention, E Coli (Bacteria), Food Contamination and Poisoning, Deaths (Fatalities), Fast Food Industry, Beef, Onions NYT > Science