Report: Chipotle Mexican Grill, Panera Bread get As on antibiotic use

A new report has graded the 25 largest U.S. fast food chains on where they stand on antibiotics.
For the third year in a row, the only two As were awarded to Chipotle Mexican Grill and Panera Bread.
More companies passed this year than ever before though.
Eleven of the top 25 chains received an F, having taken "no action to reduce use of antibiotics in their supply chains."