McDonald's Quarter Pounders have sickened people in Colorado, the CDC says.Getty ImagesMcDonald's Quarter Pounders are making people sick with E. coli, the CDC said Tuesday.One person has died, and 10 others have been hospitalized after eating the hamburgers, the agency said.McDonald's shares plunged in extended training on Tuesday following the announcement.McDonald's shares dropped more than 9% on Tuesday after the Centers for Disease Control and Prevention said one person died and 10 others were hospitalized in connection with an E.