UPDATE: Federal officials continue eyeing shredded lettuce as the cause of the cyclosporiasis outbreak centered in the Midwest. Food safety expert Dr. Jennifer McEntire explains how cyclospora spreads and why outbreaks are hard to trace.

This episode was produced by Jennifer Lai with assistance from Sofia Sanchez and Andrea Kane.

Medical Writer: Andrea Kane

Showrunner: Dan Bloom

Technical Director: Dan Dzula

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