The uncomfortable reasons human waste keeps turning up in your lettuce

This summer, the U.S. saw its largest cyclospora outbreak on record — with more than 22,000 suspected cases linked to contaminated iceberg lettuce, alongside a wave of other foodborne illnesses. Timothy D. Lytton, a law professor at Georgia State University and author of Outbreak: Foodborne Illness and the Struggle for Food Safety, joins Apple News In Conversation host David Greene to explain how America’s food-safety system actually works, how the system evolved, and what recent outbreaks reveal about the changes needed to make us all safer.