McDonald's Quarter Pounders have sickened people, the CDC says, and killed one person. The sandwich is important to the restaurant chain.Getty ImagesMcDonald's Quarter Pounder has been linked to a deadly E. coli outbreak across 10 states.The fast-food chain overhauled its famous burger in 2018 — then reported a surge in sales.Now, McDonald's says it's temporarily removing the Quarter Pounder from its menus.McDonald's push to revamp the Quarter Pounder in recent years — switching to fresh beef and pushing a marketing campaign complete with "I'd rather be eating a Quarter Pounder" stickers — hit a hurdle this week with an E.