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Federal officials say E. coli food poisoning linked to McDonald's Quarter Pounder hamburgers has sickened at least 49 people in 10 states. That includes one person who died and 10 who were hospitalized. The specific ingredient tied to the outbreak has not been identified, but investigators are focused on onions and beef.

Each summer news of foodborne illnesses from crops like lettuce and spinach make national headlines. According to the Center for Disease Control, 10…