Dozens of people across the U.S. have contracted E. coli traced to ingredients in McDonald's Quarter Pounders, the Centers for Disease Control and Prevention (CDC) said Tuesday. So far, 49 people from 10 states have fallen ill with a strain known as E. coli O157:H7, which causes a severe intestinal infection in humans. Most of the cases have been in Colorado, which has 27 reported cases, and Nebraska, which has nine reported cases, according to the CDC. MORE: Listeria recall expands to nearly 12 million pounds of meat, hits US schools Ten people have been hospitalized, including a child with...