Science writer Maryn McKenna, author of Superbug and Big Chicken, joins to discuss the feeble attempts to rein in antibiotic use in animal agriculture. As the World Health Organization and others blare out the warnings about a post antibiotic medical landscape, American livestock producers can't quite seem to fully wean their herds off prophylactic antibiotics. Incremental progress has been made over the last decade plus, but we are running out of time.

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