In this article MCD In this photo illustration, a McDonald's Quarter Pounder hamburger meal is seen at a McDonald's on October 23, 2024 in the Flatbush neighborhood in the Brooklyn borough of New York City. Michael M. Santiago | Getty Images As McDonald's and health authorities race to contain a deadly E. coli outbreak, the burger chain faces challenges in the months ahead to keep the trust of diners and investors. Shares of the fast-food giant have fallen 5% since the Centers for Disease Control and Preven ...