- The outbreak has sickened thousands — Michigan reported 7,171 cases (102 hospitalized); the CDC lists 4,173 lab-confirmed cases across 41 states and hundreds hospitalized, though no deaths.
- Some illnesses have been linked to shredded iceberg lettuce served at Taco Bell and to Taylor Farms' central Mexico-grown lettuce, but Mexican officials say there's no confirmed link.
- Health officials say tracing the source is difficult because fresh produce has a short shelf life and many more suspected cases remain under investigation.
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