McDonald’s Quarter Pounder hamburgers have been linked to an E. coli outbreak that has sickened at least 49 people and killed one, according to the Centers for Disease Control and Prevention.Illnesses have been reported in 10 states,

By Lisa Baertlein and Sneha S K (Reuters) -One person has died and dozens were sickened from E. coli infections linked to McDonald's Quarter Pounder hamburgers in 10 states, the U.S. Centers for Disease Control said on Tuesday.

In a statement, McDonald’s indicated onions may be linked to the illnesses, saying “initial findings from the investigation indicate that a subset of illnesses may be linked to slivered onions used in the Quarter Pounder and sourced by a single supplier that serves three distribution centers.”