At least 104 people have been sickened, with 34 hospitalized, in an outbreak of E. coli food poisoning tied to onions served on McDonald’s Quarter Pounder hamburgers, federal health officials ...

An outbreak of infections linked to McDonald’s Quarter Pounders has a lot of people across the United States concerned about their exposure to dangerous E. coli bacteria. It is not yet known ...

From McDonald's Quarter Pounder hamburger outbreak last month to a current recall of organic carrots sold at grocery stores ...

A map from the Centers for Disease Control and Prevention shows the states in which people have fallen ill after eating McDonald’s Quarter Pounder burgers and contracting E. coli. An outbreak of E.