Quarter Pounder

McDonald's has said it would start selling its Quarter Pounder hamburgers again, after tests for e.Coli came back clear.

Restaurants in a dozen U.S. states had temporarily pulled the burgers from their menus last week amid an outbreak linked to them saw dozens sent to the hospital and one person die.

One person has died and dozens have fallen sick following a severe E. coli outbreak linked to McDonald's Quarter Pounder hamburgers, the U.S. Centers for Disease Control and Prevention (CDC) has said.

The outbreak, which began in late September, has spread across 10 western states with most of the 49 cases concentrated in Colorado and Nebraska, the health agency said.