McDonald's is spending $100 million to bring back customers after an E. coli outbreak infected onion supplies in certain states. So far, 104 cases have been reported, the FDA says.

McDonald’s is investing $100 million to bring customers back to stores after an outbreak of E. coli food poisoning tied to onions on the fast-food giant’s Quarter Pounder hamburgers.

McDonald's is investing $100 million to bring customers back to stores after an outbreak of E. coli food poisoning tied to onions on the fast-food giant's Quarter Pounder hamburgers.