The top U.S. McDonald's executive said he’s “very confident” customers can eat safely at the restaurants, as the company's stock heads to its worst day in 4.5 years

The U.S. Center for Disease Control and Prevention (CDC) warned Tuesday of a “fast-moving” E. coli outbreak stemming from McDonald’s famed quarter pounders. In the center’s ongoing investigation opened Tuesday,

In at least 10 states there have been multiple confirmed reports that link an E. coli outbreak to the McDonald's quarter pounder.