CNN: How America’s biggest restaurant chains scored on their antibiotic use

15 of 25 American fast food chains received an “F” on responsible antibiotic use in beef supplies. Only Chipotle and Panera Bread received an “A”. When antibiotics are overused in food animals, bacteria become resistant. These superbugs can enter the human system through undercooked meat and vegetables and cause antibiotic resistance in human bodies.

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