hamburger

The recent releases come after McDonald’s said it plans to invest $100 million in hopes of bringing back customers following an E. coli outbreak linked to slivered onions on the Quarter Pounder hamburgers.

Popular for decades as a street food, America's proudest culinary invention – the hamburger – debuted at the St. Louis World's Fair in 1904 alongside other novelties such as Dr. Pepper and ice cream.

“That would mean you’re undercooking hamburger in multiple locations,” he said.

“Most people in this outbreak are reporting eating the Quarter Pounder hamburger at McDonald’s before becoming sick,” the alert read.

Most of the people infected reported eating a McDonald’s Quarter Pounder hamburger prior to becoming ill.