United States — Ohio Department of Health & Yum! Brands — Taco Bell

United States — Ohio Department of Health: Reporting over 1,100 cases and coordinating with United States — Michigan.

Yum! Brands — Taco Bell: Voluntarily removed limited ingredients from select restaurants as a precaution; under investigation for possible link.

United States — Ohio Department of Health: The United States — Ohio Department of Health reported over 4,000 cases, making United States — Ohio the second hardest-hit state.

Yum! Brands — Taco Bell: Yum! Brands — Taco Bell, a subsidiary of Yum! Brands, was the main restaurant chain linked to the contaminated lettuce. It removed the affected lettuce from its supply chain, but the outbreak has led to a significant drop in customer traffic and negative publicity.